Galaxy® HDX4
ISO 9001:2008
ISO 13485:2003 Certified
MODELS:
16 BAY 10GbE iSCSI to SAS/
SATA II RAID Subsystem
Single / Dual Controller
Installation and Hardware
Reference Manual
Galaxy HDX4 16 Bay RAID
10GbE iSCSI Host SAS / SATA Drives
7th Generation Fibre Channel RAID
With over 10,000 Galaxy units in the field, Rorke Data’s award
winning RAID products provide the performance, protection,
and expansion capabilities for diverse customer environments.
PLEASE READ BEFORE INSTALLATION
www.rorke.com
GX4L16 10GbE_0911_HMN
Rorke Data, An Avnet Company
7626 Golden Triangle Drive, Eden Prairie, MN 55344, USA
» Toll Free 1.800.328.8147 » Phone 1.952.829.0300 » Fax 1.952.829.0988
Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Table of Content
Table of Content ............................................................................................ 2
Contact Information ................................................................................................... 5
Copyright 2010 .............................................................................................. 6
This Edition First Published 2010 .............................................................................. 6
Disclaimer .................................................................................................................. 6
Trademarks ............................................................................................................... 6
Warnings and Certifications ...................................................................................... 7
FCC Class A Radio Frequency Interference Statement ........................................... 7
Safety Precautions ...................................................................................... 10
Precautions and Instructions ................................................................................... 10
ESD Precautions .............................................................................................................. 11
Revision History....................................................................................................... 11
Who should read this manual? ................................................................................ 11
Related Documentation .................................................................................................... 11
Conventions ............................................................................................................. 11
Naming ............................................................................................................................. 11
Important Messages ......................................................................................................... 11
Warnings .......................................................................................................................... 12
Cautions ........................................................................................................................... 12
Notes ................................................................................................................................ 12
Lists .................................................................................................................................. 12
Software and Firmware Updates ............................................................................. 12
Chapter 1 Introduction ................................................................................ 13
Product Overview .................................................................................................... 13
Introduction....................................................................................................................... 13
Enclosure Chassis ............................................................................................................ 14
Subsystem Components ......................................................................................... 17
Drive Trays ....................................................................................................................... 17
MUX Kit ............................................................................................................................ 18
The RAID Controller Module ............................................................................................ 19
Controller Module Interfaces ............................................................................................ 20
DIMM Module ................................................................................................................... 21
Battery Backup Module .................................................................................................... 21
Power Supply Units .......................................................................................................... 22
Cooling Modules............................................................................................................... 22
Subsystem Monitoring ............................................................................................. 23
Hot-swappable Components ................................................................................... 24
Hot-swap Capabilities ....................................................................................................... 24
Components ..................................................................................................................... 24
Normalized Airflow ........................................................................................................... 24
Chapter 2 Hardware Installation ................................................................. 25
Introduction .............................................................................................................. 25
Installation Prerequisites ......................................................................................... 25
Safety Precautions .................................................................................................. 27
Precautions and Instructions ............................................................................................ 27
Static-free Installation ....................................................................................................... 29
General Installation Procedure ................................................................................ 29
Installation Procedure Flowchart ...................................................................................... 30
Unpacking the Subsystem ....................................................................................... 31
Preinstalled Components ................................................................................................. 31
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Components to be Installed .............................................................................................. 31
Rack/Cabinet Installation ......................................................................................... 32
Package Contents ............................................................................................................ 32
Installation Pre-requisites ................................................................................................. 33
Rack-mounting Steps ....................................................................................................... 33
BBU and FBM Installation ....................................................................................... 37
BBU Module Installation Overview ................................................................................... 37
BBU Warnings and Precautions ....................................................................................... 37
BBU Installation Procedure .............................................................................................. 37
FBM (Flash Backup Module) Installation Procedure ........................................................ 39
Hard Drive Installation ............................................................................................. 39
Hard Drive Installation Prerequisites ................................................................................ 39
Drive Installation ............................................................................................................... 40
Drive Tray Installation ....................................................................................................... 41
Chapter 3 Subsystem Monitoring............................................................... 44
Overview .................................................................................................................. 44
Status-indicating LEDs ............................................................................................ 45
LCD Keypad Panel ........................................................................................................... 45
Drive Tray LEDs ............................................................................................................... 46
Controller Module LEDs ................................................................................................... 47
How to Use the Restore Default Button? .......................................................................... 49
Why restore defaults? ...................................................................................................... 49
iSCSI Host LEDs .............................................................................................................. 51
Ethernet Port LEDs .......................................................................................................... 51
PSU LEDs ........................................................................................................................ 52
Cooling Module LEDs ....................................................................................................... 53
Audible Alarm .......................................................................................................... 54
Failed Devices .................................................................................................................. 54
2
I C .................................................................................................................................... 54
Chapter 4 Subsystem Connection and Operation..................................... 55
Connection Overview: Host Connection Prerequisites ........................................... 55
Choosing Cables .............................................................................................................. 55
Lasers............................................................................................................................... 55
Speed Auto-detection ....................................................................................................... 56
SFP Transceivers ............................................................................................................. 56
Port Dust Plugs ................................................................................................................ 56
Other Concerns ................................................................................................................ 56
Topology and Configuration Considerations..................................................................... 58
Fibre Channel Topologies ................................................................................................ 58
Host-side Topologies ........................................................................................................ 58
Associated Host-side Parameters .................................................................................... 59
Sample Topology – Single-controller with Fault-tolerant Paths ........................................ 62
Sample Topology – High Availability IP SAN with Redundant RAID Controllers .............. 63
iSCSI Topology and Host LUN Mapping: ......................................................................... 64
Expansion Links ...................................................................................................... 65
Single-controller RAID to single-controller JBOD ............................................................. 65
Dual-controller RAID to dual-controller JBOD. ................................................................. 66
Enclosure ID and Other Concerns .................................................................................... 68
Powering On ............................................................................................................ 69
Check List......................................................................................................................... 69
Power-On Procedure ........................................................................................................ 70
Power-On Enclosure ........................................................................................................ 70
Power-On Status Check ................................................................................................... 71
Power Off Procedure ............................................................................................... 72
Chapter 5 Subsystem Maintenance and Upgrading ............................... 73
Overview .................................................................................................................. 73
Maintenance ..................................................................................................................... 73
General Notes on Component Replacement .................................................................... 73
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Replacing a Controller Module ................................................................................ 75
Overview .......................................................................................................................... 75
Notes on Controller Maintenance ..................................................................................... 75
Removing the Controller Module ...................................................................................... 75
Replacing the Controller Module ...................................................................................... 77
Replacing or Upgrading Memory Modules .............................................................. 78
Memory Module Installation Overview .............................................................................. 78
Selecting Memory Modules .............................................................................................. 78
DIMM Module Installation ................................................................................................. 78
Replacing a Faulty BBU .......................................................................................... 80
Fault Conditions: .............................................................................................................. 80
BBU Warnings and Precautions ....................................................................................... 80
Replacing a Faulty BBU ................................................................................................... 81
Replacing a Faulty Flash Backup Module (FBM) ............................................................. 82
Replacing a Faulty PSU .......................................................................................... 83
Notes on PSU Module Maintenance ................................................................................ 83
Replacing the PSU Module .............................................................................................. 84
Cooling Module Maintenance .................................................................................. 85
Notes on Cooling Module Maintenance............................................................................ 85
Replacing a Cooling Module............................................................................................. 86
Replacing a Hard Drive ........................................................................................... 86
Hard Drive Maintenance Overview ................................................................................... 86
Replacing a Hard Drive .................................................................................................... 87
Appendix A Specifications ......................................................................... 89
Technical Specifications .......................................................................................... 89
Controller Specifications .......................................................................................... 91
Configuration .................................................................................................................... 91
Architecture ...................................................................................................................... 92
Power Supply Specifications ................................................................................... 92
RAID Management .................................................................................................. 93
Fault Tolerance Management ................................................................................. 93
Appendix B Pin-outs................................................................................. 95
SFP FC Port Pin-outs .............................................................................................. 95
Ethernet Management Port Pinouts ........................................................................ 97
DB-9 Serial Port ....................................................................................................... 97
SAS Expansion Port Pinouts ................................................................................... 98
Power 99
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Contact Information
Contact Information
Americas
Rorke Data , An Avnet company
7626 Golden Triangle Drive
Eden Prairie, MN 55344
USA
Tel: +1-800 328 8147
Fax: +1-952 829 0988
rorkesales@avnet.com
rorkesupport@avnet.com
http://www.rorke.com
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Copyright 2010
This Edition First Published 2010
All rights reserved. This publication may not be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language
or computer language, in any form or by any means, electronic,
mechanical, magnetic, optical, chemical, manual or otherwise, without the
prior written consent of Galaxy Technology, Inc.
Disclaimer
Rorke Data makes no representations or warranties with respect to the
contents hereof and specifically disclaims, if any implied warranties of
merchantability or fitness for any particular purpose. Furthermore, Rorke
reserves the right to revise this publication and to make changes from
time to time in the content hereof without obligation to notify any person of
such revisions or changes. Product specifications are also subject to
change without prior notice.
Trademarks
Galaxy® and the Galaxy logo are registered trademarks of Rorke Data,
an Avnet Company.
®
PowerPC is a trademark of International Business Machines Corporation
and Motorola Inc.
Solaris and Java are trademarks of Sun Microsystems, Inc.
All other names, brands, products or services are trademarks or
registered trademarks of their respective owners.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Warnings and Certifications
Restricted Access Location:
This equipment is intended to be installed in a RESTRICTED
ACCESS LOCATION only.
Electric Shock Warning!
To Prevent Electric Shock:
Access to this equipment is granted only to trained operators and
service personnel who have been instructed of and fully understand
the possible hazardous conditions and the consequences of
accessing non-field-serviceable units. For example, touching the
backplane with a metal tool may cause electric shock.
FCC (applies in the U.S. and Canada)
FCC Class A Radio Frequency Interference
Statement
This device complies with Part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device may accept any interference received,
including interference that may cause undesired operation.
NOTE:
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
WARNING:
A shielded power cord is required in order to meet FCC emission limits
and also to prevent interference to nearby radio and television reception.
Use only shielded cables to connect I/O devices to this equipment. You
are cautioned that changes or modifications not expressly approved by
the party responsible for compliance could void your authority to operate
the equipment.
This device is in conformity with the EMC.
CB
CCC
(Certified Worldwide)
This device meets the requirements of the CB standard for
electrical equipment with regard to establishing a satisfactory
level of safety for persons using the device and for the area
surrounding the apparatus. This standard covers only safety
aspects of the above apparatus; it does not cover other
matters, such as style or performance.
For Power Supplies’ compatibility to China Compulsory
Certification.
China RoHS
In Compliance with AeA China RoHS Regulations (SJ/T 11364-2006)
ITE BSMI Class A, CNS 13438 (for Taiwan)
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
This device is in conformity with UL standards for safety.
Инструкция по безопасности
Модель:
iSCSI to SAS/SATA 3U/16 bay RAID Subsystem, Galaxy HDX4 and no
impact safety related critical components and constructions.
Перед использованием оборудования внимательно прочтите
инструкцию.
2. Сохраняйте инструкцию для дальнейшего использования в работе.
3. Не допускайте попадания влаги на изделие.
4. Устанавливайте оборудование на устойчивую поверхность.
Падение может нанести ущерб оборудованию.
5. Соблюдайте климатические требования, использование
оборудование при температуре окружающей среды выше 50°С,
может привести к выходу оборудования из строя.
6. Размещайте шнур питания в недоступном для пользователя месте.
Запрещается ставить на шнур питания какие-либо предметы.
7. При работе с оборудованием необходимо учитывать все
предупреждения и замечания.
8. Если оборудование не используется в течении длительного
времени, отключите его от сети питания.
9. Запрещается вскрывать оборудование. Оборудование может
вскрываться только квалифицированным персоналом.
10. При возникновении одного из повреждений оборудования вызовите
обслуживающий персонал:
a. Повреждение шнура питания или вилки.
b. Оборудование не работает или его работа не соответствует
инструкции пользователя .
e. Оборудование повреждено.
f. Оборудование имеет очевидный признак поломки.
11. Источник питания должен быть установлен в соответствии с
инструкцией. Ток нагрузки и выходная мощность не должны
превышать указанных в спецификации.
1.
Galaxy is committed to being properly prepared and taking all
the necessary steps that will result in our compliance with the
new European directive, RoHS (2002/95/EC), on or before
the specific dates set forth in those applicable laws and
regulations. Galaxy is applying its own internal efforts and
expertise and is working closely with customers and suppliers
to achieve compliance while maintaining an uninterrupted
supply of quality products. Galaxy is currently investigating,
evaluating, and qualifying our materials and components to
ensure that products sold on or after 1 July 2006, in such
territory, are in compliance with the above regulations.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Disposal of Old Electrical & Electronic Equipment (Applicable
in the European Union and other European countries with
separate collection systems)
This symbol on the product or on its packaging indicates that
this product shall not be treated as household waste. Instead
it shall be handed over to the applicable collection point for
the recycling of electrical and electronic equipment. By proper
waste handling of this product you ensure that it has no
negative consequences for the environment and human
health, which could otherwise be caused if this product is
thrown into the garbage bin. The recycling of materials will
help to conserve natural resources.
For more details about recycling of this product, please
contact your local city office, your household waste disposal
service or the shop where you purchased the product.
Safety Precautions
Precautions and Instructions
•
Prior to powering on the subsystem, ensure that the correct power range is
being used.
•
If it is necessary to transport the subsystem, repackage all disk drives
separately in the drive trays and in the original package foam blocks. If using
the original package material, other replaceable modules can stay within the
enclosure.
•
The subsystem comes with 16 drive bays. Leaving any of these drive bays
empty will greatly affect the efficiency of the airflow within the enclosure, and
will consequently lead to the system overheating, which can cause irreparable
damage.
•
If a module fails, leave it in place until you have a replacement unit and you
are ready to replace it.
•
Airflow Consideration: The subsystem requires an airflow clearance,
especially at the front and rear. A clearance of at least 18 to 20 centimeters is
required at the rear side and any objects blocking the exhaust airflow, e.g.,
cables dangling at the fan outlet, should be avoided.
•
Handle subsystem modules using the retention screws, eject levers, and the
metal frames/face plates. Avoid touching PCB boards and connector pins.
•
To comply with safety, emission, or thermal requirements, none of the covers
or replaceable modules should be removed. Make sure that all enclosure
modules and covers are securely in place during operation.
•
Be sure that the rack cabinet into which the subsystem chassis will be
installed provides sufficient ventilation channels and airflow circulation around
the subsystem.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
•
Provide a soft, clean surface to place your subsystem on before working on it.
Servicing on a rough surface may damage the exterior of the chassis.
•
If it is necessary to transport the subsystem, repackage all drives separately.
•
Dual-redundant controller models come with two RAID controllers that should
always be present. Single-controller models come with a single RAID
controller and a metal sheet is placed over the lower controller bay at the rear
of the subsystem. Since single-controller models cannot be upgraded, this
metal sheet should NEVER be removed.
ESD Precautions
Observe all conventional anti-ESD methods while handling system
modules. The use of a grounded wrist strap and an anti-static work pad
are recommended. Avoid dust and debris in your work area.
Revision History
Rev. 1.0: Initial release.
Who should read this manual?
This manual assumes that its readers are experienced with computer
hardware installation and are familiar with storage enclosures.
Related Documentation
•
Generic Operation Manual (firmware operation via LCD keypad or
terminal emulation)
•
Galaxy Array Manager User’s Manual
These two (2) documents are included in the product utility CD that came
with your subsystem package.
Conventions
Naming
From this point on and throughout the rest of this manual, the HDX4
series is referred to as simply the “subsystem” or the “system”.
Important Messages
Important messages appear where mishandling of components is
possible or when work order can be mis-conceived. These messages
also provide important information associated with other aspects of
system operation. The word “important” is written as “IMPORTANT,”
both capitalized and bold and is followed by text in italics. The italicized
text is the message to be delivered.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Warnings
Warnings appear where overlooked details may cause damage to the
equipment or result in personal injury. Warnings should be taken
seriously. Warnings are easy to recognize. The word “warning” is written
as “WARNING,” both capitalized and bold and is followed by text in italics.
The italicized text is the warning message.
Cautions
Cautionary messages should also be heeded to help you reduce the
chance of losing data or damaging the system. Cautions are easy to
recognize. The word “caution” is written as “CAUTION,” both capitalized
and bold and is followed by text in italics. The italicized text is the
cautionary message.
Notes
These messages inform the reader of essential but non-critical
information. These messages should be read carefully as any directions
or instructions contained therein can help you avoid making mistakes.
Notes are easy to recognize. The word “note” is written as “NOTE,” both
capitalized and bold and is followed by text in italics. The italicized text is
the cautionary message.
Lists
Bulleted Lists: Bulleted lists are statements of non-sequential facts. They
can be read in any order. Each statement is preceded by a round black
dot “•.”
Numbered Lists: Numbered lists are used to describe sequential steps
you should follow in order.
Software and Firmware Updates
Please contact your system vendor for the latest software or firmware
updates. NOTE that the firmware version installed on your system should
provide the complete functionality listed in the specification sheet/user’s
manual. We provide special revisions for various application purposes.
Therefore, DO NOT upgrade your firmware unless you fully understand
what a firmware revision will do.
Problems that occur during the updating process may cause irrecoverable
errors and system down time. Always consult technical personnel before
proceeding with any firmware upgrade.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Chapter 1
Introduction
Product Overview
Introduction
This
chapter
briefly
introduces the Galaxy HDX4
16 bay 10Gb iSCSI-to-6Gb
SAS/SATA-II
storage
subsystem.
The
HDX4
subsystem comes with two
(2) iSCSI host ports on each
RAID controller to deliver fast
I/O performance over iSCSI packets.
Galaxy HDX4 16 bay enclosure
Galaxy’s iSCSI storage supports network initiators compatible with the
IETF (Internet Storage Name Server) iSCSI standard (RFC 3720) with the
following functionality:




Access control via NetMask, IQN, and IP filtering
iSNS & SLP device discovery (firmware rev. 3.64)
CHAP access control security
Jumbo frames
Internet SCSI (iSCSI) protocols are embedded in firmware and I/Os are
rapidly processed via dedicated algorithms. The HDX4 is built around
reliable hardware and sophisticated RAID technologies. I/O requests are
packaged and transmitted over local area networks (LANs), wide area
networks (WANs), or the Internet using the existing Ethernet network and
thus the total cost of ownership is reduced. With the help of the
networking flexibility, the subsystem is ideal for location-independent data
storage, backup, and retrieval.
The subsystem delivers extreme performance that results from the
combined performance of multiple disk drives and the level of data
protection unseen in other iSCSI storages. Featuring all standard RAID
functionality as other HDX4 subsystems, the subsystem provides a
reliable platform for IT operations such as backup, data-mining, or
strategic data allocation.
This subsystem features a high-density architecture that supports hot
swappable SAS or SATA-II hard drives. The subsystem is powered by
active-active or a single RAID controller featuring the latest ASIC667
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
RAID engine. The pre-installed 2GB DDR-II RAM DIMM module can be
upgraded to a 4GB capacity DIMM.
In addition to the ease of implementation, the HDX4 also supports
capacity expansion via its SAS links by attaching JBODs.
The HDX4 RAID features high-availability design with dual-active RAID
controllers. Dual-redundant, hot-swappable cooling modules, battery
backup, and power supplies ensures the optimal up time. The modular
nature of the subsystem and the easy accessibility to all components
ensure the ease of maintenance.
NOTE:
On receiving and unpacking your subsystem, please check the
package contents against the included Unpacking Checklist. If
any modules are missing, please contact your vendor immediately.
Enclosure Chassis
Chassis Overview
The RAID storage is housed in a robust chassis that is divided into the
front and the rear sections. Key components are respectively accessed
through the front and rear panels. The enclosure chassis can be mounted
into a standard 19-inch rack or enclosure cabinet using support brackets
that are separately-purchased.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
NOTE:
Components accessed through the front panel are referred to as
“Front Panel Components” and components accessed through
the rear panel are referred to as “Rear Panel Components.”
Front Panel Overview
The front section of the subsystem features a 4x4 layout for 16 3.5-inch
disk drives. The handles on the front of the subsystem enable you to
easily extract the chassis from a rack or cabinet. The front view is shown
below. A description of each front panel component is given below:
HDX4 Front View
The front panel components include:
•
Drive bays with drive tray canisters:
The drive bays
accommodate either SAS or SATA-II 3.5” disk drives.
•
Forearm handles: The subsystem has right- and left-side
handles for easier rackmount handling.
Hard Drive Numbering
The front section of the enclosure houses sixteen (16) hard drives in a
4x4 configuration. When viewed from the front, the drive bays (slots) are
numbered 1 to 16 from left to right and then from top to bottom.
Hard Drive Numbering
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Rear Panel Overview
The rear section of the subsystem is accessed through the rear panel and
is reserved for RAID controllers, power supply units (PSUs) and cooling
modules.
A rear view of the subsystem is shown below. Descriptions of each rear
panel component are given in the following sections:
HDX4 Dual (top) / HDX4 Single (bottom) Rear View
The enclosure rear section accommodates the following components:
•
RAID controller module(s): The RAID controller module
manages all functionalities provided with the subsystem, and all
interface connectors are provided on the controller faceplates.
•
BBU module (within the controller canister): BBU modules
come as standard equipment for the redundant-controller model,
and as an optional module for the single-controller. The BBU
sustains unfinished writes cached in memory during a power
outage in order to prevent data loss.
•
PSU modules: The hot-swappable PSUs receive single-phase
power and deliver +5V, +12V, and +3.3V power to the subsystem.
A power switch is located on each PSU to turn the system on and
off.
•
Cooling modules: The redundant cooling modules ventilate the
subsystem to maintain a cooling airflow across the subsystem.
Backplane Board
An internal backplane board separates the front and rear sections of the
enclosure. The backplane consists of traces for logic level signals and low
voltage power paths. It contains no user-serviceable components.
WARNING!
When inserting a removable module, DO NOT USE EXCESSIVE
FORCE! Forcing or slamming a module can damage the pins on
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
the module connectors either on the module itself or on the
backplane. Gently push the module until it reaches the end of
module slot. Feel the contact resistance and use slightly more
pressure to ensure the module connectors are correctly mated. If
the module comes with ejection levers or retention screws, use
them to secure the module.
Subsystem Components
The HDX4 enclosure houses many active components and most of them
can be accessed through either the front or the rear panel. The modular
design of the components facilitates their easy installation and removal.
Hot-swap mechanisms are incorporated to eliminate power surges and
signal glitches that might occur while removing or installing these
modules.
Drive Trays
Drive Tray Front View
Drive installation and screw locations
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
The subsystem comes with 16 drive trays designed to accommodate
separately purchased, standard 1-inch pitch, 3.5-inch SAS or SATA-II disk
drives. The drive bays are accessible from the enclosure front panel. Two
(2) LEDs on the front bezel indicate the operating statuses. A rotary bezel
lock on each drive tray secures the hard drive in place, while a release
button enables fast retrieval of a hard drive.
.
WARNING!
Be careful not to warp, twist, or contort the drive tray in any way
(e.g., by dropping it or resting heavy objects on it). The drive tray
has been customized to fit into the drive bays of the subsystem. If
the drive bay superstructure is deformed or altered, the drive trays
may not fit into the drive bays.
MUX Kit
Unlike the dual-ported SAS drives, using the single-port SATA drives with
a redundant-controller RAID requires a MUX board.
Figure 1-1: Dual-ported SAS and Single-port SAS Connectors
The MUX board provides port selector circuits for access from different
RAID controllers to an individual disk drive. See the drawing below for
how it works.
MUX Kit Working Theory
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
If SAS drives are preferred, these MUX boards will be unnecessary and must
be manually removed from the drive trays.
MUX Kit
The RAID Controller Module
The default size for the DDR-II DIMM module on RAID controllers is 2GB.
RAID controller module contains a main circuit board, a preinstalled 2GB
memory, charger circuitry. The controller module contains no userserviceable components. Except when installing/ upgrading the cache
memory inside, the controller module should never be removed or
opened.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
WARNING!
Although the RAID controller can be removed, the only time you
should touch the controller itself is to install the memory modules.
The RAID controller is built of sensitive components and
unnecessary tampering can damage the controller.
The system is managed by the RAID controller(s). The controller comes
with two (2) 10Gb iSCSI host ports. The subsystem connects to the host
through SFP connectors, while the connectors are also ready to connect
to one or more network switches, enabling access to your storage
volumes in complex configurations such as data-sharing or Virtual LAN
segments.
Controller Module Interfaces
All external interfaces that connect to external devices are located on the
controller module’s rear-facing faceplate. The interfaces are listed below.
Controller Module Interfaces

Host ports: Two (2) 10G iSCSI host ports (indicated as CH0 and
CH1 in the diagram shown above) connect the r subsystem to the
networked iSCSI initiators through SFP connectors.

Serial port: The controller module comes a serial port for local
access to the firmware embedded configuration utility and the
connection to a UPS device.

LED indicators: Six (6) LED indicators illustrate the system
statuses for system monitoring.

Ejection Levers: Two (2) ejection levers located on the sides of
the controller ensure that the back-end connectors are properly
seated in the module slot and properly mated with the backplane.

Management LAN Port: Another 10/100BaseT Ethernet port
connects the subsystem to a management computer. Available
management interfaces include: telnet, Java-based Galaxy Array
Manager.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual

Restore Default LED and button: The push button and LED are
used to restore firmware defaults in cases when upgrading
firmware, upgrading DIMM size, or if an administrator forgets
system password.
DIMM Module
The controller module comes with a preinstalled 2GB capacity or above
DDR-II RAM DIMM module and the allocable size can reach 4GB. The
memory socket is located on the side of the controller board.
Battery Backup Module
Standard in redundant controller models and an option for single
controller models, the separately purchased Li-Ion battery backup unit
(BBU) module (see the diagram below) can sustain cache memory for
days during the event of power outage. The battery module comes with
an EEPROM that marks the installation date, and system administrators
will be notified when the one-year lift expectancy is reached. Please refer
to Chapter 2 for installation instructions.
BBU Module
In accordance with international transportation regulations, the BBU
module can only be partially charged when shipped. Therefore, when
powering on the subsystem for the first time the BBU will begin to charge
its batteries to their full capacity. It normally requires approximately twelve
(12) hours for the battery to be fully charged. If the battery is not fully
charged after twelve (12) hours, there may be a problem with the BBU
module. You may need to re-install the battery; and if the battery still
shows problems with charging, contact your subsystem vendor for a
replacement. While the battery is being charged, the LED on the BBU will
start flashing.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
You can check battery’s charge level using the Galaxy Array Manager
software or the embedded firmware utility.
Power Supply Units
The subsystem is equipped with two (2) redundant and hot-swappable
PSUs for models hot-swappable that are installed into the rear section of
the chassis.
NOTE:
Swapping the PSU(s) also removes the cooling module(s).
Each PSU comes with a power socket and a power switch to turn the
system on and off. A single LED indicates the PSU status (lights red when
failure occurs). An extraction handle at the rear of the PSU is designed to
help properly install or remove the module.
PSU
Cooling Modules
Cooling modules are located within the PSUs (shown in the illustration
below, on the left) and 4U enclosures cooling modules are located above
the PSUs (shown in the illustration below, on the right). The cooling fans
operate at two (2) fan speeds. When the subsystem operates normally,
the cooling fans operate at the minimum speed. If a major component fails
or when one of the temperature thresholds has been violated, the cooling
fans automatically raise its rotation speed.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Location of cooling modules
Subsystem Monitoring
The iSCSI RAID subsystem comes with a number of different monitoring
methods that provide you with continual updates on the operating
statuses of the subsystem and individual components. The following
monitoring features are included:
I2C bus
The following subsystem elements are interfaced to the RAID controller
over a non-user-serviceable I2C bus:

Cooling modules

Module presence detection circuits

Temperature sensors (for detecting the temperature on the
backplane board and controller board)
LED Indicators
The following components come with LEDs to indicate the operating
statuses of individual components:

RAID controller (controller status LED on controller faceplate)

BBU module (status indicated by CBM LED on the rear controller
faceplate)

Cooling modules (LEDs on PSU faceplates)

PSU modules (1 LED on each module indicating PSU status)

Drive trays (2 LEDs on each tray)
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Audible Alarms
The subsystem comes with an audible alarm that is triggered when a
component fails or when the pre-configured temperature or voltage
thresholds are exceeded. Whenever you hear an audible alarm, it is
imperative that you determine the cause and rectify the problem
immediately.
Event notification messages indicate the completion or status of array
configuration tasks and are always accompanied by two (2) or three (3)
successive and prolonged beeps.
WARNING!
Failing to respond when an audible alarm is heard can cause
permanent damage to the subsystem. When an audible alarm is
heard, rectify the problem as soon as possible.
Hot-swappable Components
Hot-swap Capabilities
The subsystem comes with a number of hot-swappable components. A
hot-swap component is one that can be exchanged while the subsystem
is still online without affecting the operational integrity of the subsystem.
These components should only be removed from the subsystem when
they are being replaced. At no other time should these components be
removed from the subsystem.
Components
The following components are hot-swappable:

RAID controller (in a redundant-controller configuration)

Power supply units (PSUs)

BBU module (for the redundant model only)

Hard disk drives
Normalized Airflow
Proper cooling is referred to as “normalized” airflow. Normalized airflow
ensures the sufficient cooling within the subsystem and is only attained
when all components are properly installed. Therefore, a failed
component should only be removed when a replacement is available. If a
failed component is removed but not replaced, airflow will disrupted and
permanent damage to the subsystem can result.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Chapter 2
Hardware Installation
Introduction
This chapter gives detailed instructions on how to install the subsystem.
When installing the subsystem, it is necessary to mount the chassis into a
rack cabinet and to install hard drives and drive trays. Installation into a
rack or cabinet should occur before the hard drives or drive trays are
installed into the subsystem. Please confirm that you received all of the
components listed on the included Unpacking List before proceeding
with the installation process.
Installation Prerequisites
1. Static-free installation environment: The subsystem must be
installed in a static-free environment to minimize the possibility of
electrostatic discharge (ESD) damage.
2. Component check: Before installing the subsystem, you should first
check to see that you have received all the required components. If
any items appear damaged, contact your vendor for a replacement.
3. Hard drives: Up to 16 SAS/ SATA-II hard drives have been preinstalled in the drive trays.
4. Cabling:
The HDX4 models come with the following cables;
1. Redundant model only: One DB9 males to 1 female serial Y-cable
to facilitate the connection of the serial port to a management
computer for management over a terminal emulation program and
UPS device.
2. Two (2) Power cords are provided for connections to the power
sources. Type is determined by the shipped-to area.
Other cables are user-supplied:
1. Host link cables: For the compliance with listed emission
standard, SFP and FC cables should be applied. Galaxy provides
certified cables as an optional accessory. It supports 1, 5, 10M
cables as accessory options.
2. One (1) or two (2) Ethernet cables to the 10/100BasetT
management port.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
5. Memory module: If you wish to change the pre-installed memory
module, a separately purchased module can be installed.
6. BBU module: The BBU module is optional for the single-controller
models. The module can be purchased separately.
7. Mixing SAS and SATA drives in the same enclosure is allowed.
However, please DO NOT mix SAS and SATA-II drives in the same
drive column.
8. DO NOT place a column of SATA-II disk drives between two columns
of SAS disk drives. With a higher rotation speed, the SAS disk drives
on the flank of SATA-II disk drives will eventually cause a stability
issue.
Supported and Unsupported Drive Configurations
9.
Hard drives: Up to 16 SAS or SATA-II hard drives should be
available prior to installing the enclosure.
NOTE:
Some SATA-II disk drives may come with a default of 1.5Gbps
speed. The system only supports SATA drives operating at 3Gbps
speed, and it will be necessary you configure these drives into
3Gbps speed using its the jumpers or configuration utility.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Safety Precautions
Precautions and Instructions
1. Static-free installation environment: The enclosure must be
installed in a static-free environment to minimize the possibility of
electrostatic discharge (ESD) damage.
2. Component check: Before installing the enclosure, check to see that
you have received all the required components. If any items appear
damaged, contact your vendor for a replacement.
3. Rack installation: The enclosure chassis can be installed into a rack
cabinet using separately purchased mounting rails, rear-attached
brackets, or Galaxy’s rackmount rails.
4. Disconnect the power cords if the need should arise for cleaning the
chassis. Do not use liquid or sprayed detergent for cleaning. Use a
lightly moistened clothe for cleaning.
5. Be sure the correct power range (100-120 or 220-240VAC) is
supplied by your rack cabinet or power outlet. It is highly
recommended to connect two different power supplies to separate
power sources; e.g., one to a power outlet, and the other to a UPS
system.
6. Thermal notice: All drive trays (even if they do not contain a hard
drive) must be installed into the enclosure. Leaving a drive bay or
module slot open will severely affect the airflow efficiency within the
enclosure, and will consequently lead to system overheating. Keep a
faulty module in place until you have a replacement unit and you are
ready to replace it.
7. Rack-mounting: The subsystem is intended to be rack-mounted.
Following concerns should be heeded when mounting the enclosure
into a rack cabinet:
a. An enclosure without disk drives can weigh over 19
kilograms. Two (2) people are required to install or relocate
the subsystem. Drives should be removed from the enclosure
before moving the subsystem.
b. The subsystem is designed to operate in an environment
where the ambient temperature around the chassis must not
exceed 40°C.
c.
The openings on the enclosure are for air circulation and
hence the ventilation openings should never be obstructed.
d. Proper grounding, over-current protection, and stability
features should be provided with the rack cabinet into which
the subsystem is mounted.
8. Operate the subsystem in an environment with least humidity.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
9. Lay the subsystem on a reliable surface when servicing individual
modules. A drop or fall can cause injury.
10. Make sure the voltage of the power source is within the rated values
as indicated by the label attached to the power supplies before
connecting the subsystem to the power source. You may also refer to
the Appendix A of this manual for technical details.
11. Airflow considerations: The subsystem requires an airflow clearance
especially on the front and the rear sides. For proper ventilation, a
minimum of 2.5cm is required between the front of the enclosure and
rack cover; a minimum of 18 to 20cm is required on the rear side.
12. Handle the system modules by the retention screws, ejection levers,
or the modules’ metal frames/faceplates only. Avoid touching the PCB
boards and connector pins.
13. None of the covers or replaceable modules should be removed in
order to maintain compliance with safety, emission, or thermal
requirements.
14. If the subsystem is going to be left unused for a long time, disconnect
the subsystem from mains to avoid damages by transient overvoltage.
15. Never pour any liquid into ventilation openings; this could cause fire or
electrical shock.
16. Never open the subsystem top cover. For safety reasons, only
qualified service personnel could access the interior of the chassis.
17. Always secure every enclosure module by its retaining screws or
make sure it is held in place by its latches or hand screws.
18. Always make sure the subsystem has a safe electrical earth
connection via power cords or chassis ground by the rack cabinet.
19. Be sure that the rack cabinet in which the subsystem chassis is to be
installed provides sufficient ventilation channels and airflow circulation
around the subsystem.
20. Provide a soft, clean surface to place your enclosure on before
working on it. Servicing the enclosure on a rough surface may
damage the finish of the chassis.
21. If it is necessary to transport the subsystem, repackage all disk drives
separately.
22. If one of the following situations arises, get the enclosure checked by
service personnel:
a. Any of the power cords or plugs is damaged.
b. Liquid has penetrated into the subsystem.
c.
The enclosure has been exposed to moisture.
d. The subsystem does not work well or you cannot get it work
according to this manual.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
e. The subsystem has dropped and been damaged.
f.
The subsystem shows obvious signs of breakage.
Static-free Installation
Static electricity can damage the system’s electronic components. To
prevent ESD damage to any of the components, follow these precautions
before touching or handling them:

Discharge the static electricity accumulated in your body by
wearing an anti-static wristband.

Use antistatic strap during handling. Connect the equipment end
of the strap to an unfinished chassis surface.

Avoid carpets, plastic, vinyl, and styrofoam in your work area.

If the need should arise for carrying subsystem modules from one
place to another, carry them in a static shielding container.

Avoid the contact between circuit boards and clothing.

Handle all components by holding their edges or metal frames.
Avoid touching the exposed circuitry on PCB boards and
connector pins.
General Installation Procedure
Following all the instructions provided below can save subsystem
installation time. Detailed, illustrated instructions for each component are
given in the following sections.
CAUTION!
To ensure that your system is correctly installed, please follow the
steps outlined below. If you follow these steps, installation will be
fast and efficient. If you do not follow these steps, you may
accidentally install the hardware incorrectly.
Step 1.
Unpack: Unpack the subsystem and confirm that all the
components on the Unpacking Checklist have been
included.
Step 2.
Install an optional BBU: If a BBU has been separately
purchased, it should be installed prior to operating the
subsystem.
Step 3.
Rack/Cabinet installation: If the subsystem is going to
be installed in a rack or cabinet, it should be installed prior
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
to installing the hard drives. Installing the subsystem into a
rack or cabinet requires at least two (2) people.
Step 4.
Install hard drives: Your purchased SAS / SATAII/SATA-I hard drives have been pre-installed into the
drive trays.
Step 5.
Install drive trays: After the empty HDX4 enclosure has
been installed into the rack, the drive trays with drives
must be installed into the enclosure itself.
Step 6.
Cable connection: Use the power cords that came with
the subsystem to connect the subsystem to the main
power source. Use self-purchased RJ-45 cables to
connect host ports to the network or external devices.
Step 7.
Power up: Once the components have been properly
installed and all cables are properly connected, you can
power up the subsystem and configure the RAID array.
Installation Procedure Flowchart
Below is a flowchart of the installation procedure. As you complete each
step, check off the “Done” box on the right. Please use this flowchart in
conjunction with the instructions that follow.
Installation Procedure Flowchart
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Unpacking the Subsystem
Use the Unpacking Checklist in your package to verify package
contents. Carefully check the items contained in each box before
proceeding with installation.
NOTE:
A detailed packing list can be found in your product shipping
package or product CD.
The space within each package carton can be separated into upper and
lower levels.
Upper level:
•
The two (2) foam packages on the upper level contain:
16 drive trays with drives installed
Lower level: Three (3) boxes are placed in the lower level. One (1) box
contains the enclosure chassis with all the pre-installed components. The
other two (2) boxes contain power cords and accessory items.
The included contents and accessories are:
1. One GUI CD pack, HW manual and operation manual inside
2. One Galaxy Array Manager CD pack
3. Two power cords
4. One DB-9 to DB-9 Y-cable (Dual controller model only)
5. 50 screws for HDD installation
6. 16 screws for mounting enclosure to rack(M6 x4 and M5 x4 and
#10-32 x4)
Preinstalled Components
The following components have been preinstalled in the enclosure and
therefore do not need to be installed:








2 - Forearm handles (right and left)
1 - Backplane board
Controller module(s)
1 - DDR-II RAM DIMM module (installed in the controller module)
2 - PSU modules
2 - BBU (for the redundant-controller )
1 - LCD keypad panel
2 - Cooling fan modules (within PSU canisters)
Components to be Installed
You must install the following components:

Rackmount rails
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual


Drive trays [with drives pre installed ] install into the RAID chassis
BBU module (if ordered as an optional component)
Rack/Cabinet Installation
The subsystem is designed to fit into a variety of 19-inch rack cabinets or
racks. Make sure you have an appropriate site location and cables
prepared with adequate lengths to connect to mains and other devices.
The subsystem should be installed in the rack or cabinet before the hard
drives and the drive trays are installed. If the drive trays with the
associated hard drives are installed, the subsystem will be too heavy to
mount into a rack or cabinet. When installing the subsystem into a rack or
cabinet it is advisable that two (2) people assist in the mounting process.
Package Contents
The rackmount rail kit includes the following components. Be sure to
confirm that you have received each item listed below:
Item
01
Description
Mounting bracket assembly, L-shape, left-side
Quantity
1
02
Mounting bracket assembly, L-shape, right-side
1
03
Inner glide
2
04
Flange filler plate (fixed behind chassis ears)
2
05
Cross recess truss head screws M5 x 9.0mm
8
06
#6-32 x10mm flathead screws
4
07
#6-32 L6 flathead screws
6
08
M5 cage nuts
4
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Rackmount Rail Components
Inner Glide Orientation: Top View
Inner Glide: Side View
Inner Glide
Installation Pre-requisites
•
•
•
1 medium-size cross-head screwdrivers
1 medium-size flat-head screwdriver
Because the RAID subsystem can weigh over 19 kilograms, 2 people
are required to rack-mount the enclosure.
Rack-mounting Steps
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
•
Determine where in the rack, the subsystem is going to be installed.
CAUTION!
The mounting positions must be carefully measures so that rails
can be mounted parallel to each other.
•
Use the figure below to measure the relative locations of the cage
nuts on the rack posts (if they do not have threaded holes). There
are 5 holes between clip nuts. Attach two M5 clip nuts (#07) on
each of the front rack posts.
Attaching Cage Nuts to a Front Rack Post
•
Adjust the length of the rail assembly and make sure the bend of
the L-shape rail (#01) faces inward.
Adjust Rail Length
•
Position the front-end of a rail below the top clip nut. Secure the rail
to the front and rear rack posts each using two position screws
(#08). (See figure below) Do not insert the screws into the cage
nuts as cage nuts will be used to secure the enclosure later.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Securing Rail to Rack Post
•
Attach the filler plates (#04) behind the enclosure ears using the
three #6-32 x 12mm flat head screws (#09) on each side.
Securing a Filler Plate
•
Place the enclosures onto the rails and slide the enclosure into rack
until it chassis ears flush with the front rack posts. Two people are
required.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
•
•
Mounting the Enclosure
Attach the rear supports to the rear side of the enclosure each
using two #6-32 x 12mm flat head screws (#09).
Fasten four M5 x 35mm screws (#10) through the holes on the
forearm handles.
Securing Enclosure into Rack
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
BBU and FBM Installation
BBU Module Installation Overview
The BBU module is an optional item for single controller models. It can
sustain cache memory in the event of a power failure or in the unlikely
event of failing both PSUs. A BBU is highly recommended. The optional
BBU provides additional data security and helps minimize the loss of data
during power outage.
The BBU module is inserted into a module slot on the controller module.
The BBU module is secured with two (2) retention screws.
BBU Warnings and Precautions

Install or replace the BBU module only with a BBU module supplied
by your subsystem vendor. Use of battery cells provided by another
source will void our warranty.

Always dispose of discharged or used batteries in an ecologically
responsible manner. Dispose used BBUs at authorized battery
disposal sites only.

Do not use nor leave the BBU near a heat source. Heat can melt the
insulation and damage other safety features of battery cells, possibly
leading it to acid leak and result in flames or explosion.

Do not immerse the BBU in water nor allow it to get wet. Its protective
features can be damaged. Abnormal chemical reactions may occur,
possibly causing functional defects, acid leak, and other hazardous
results.

Do not disassemble or modify the BBU. If disassembled, the BBU
could leak acid, overheat, emit smoke, burst and/or ignite.

Do not pierce the BBU with a sharp object, strike it with a hammer,
step on it, or throw it. These actions could damage or deform it,
internal short-circuiting can occur, possibly causing functional
defects, acid leak, and other hazardous results.

If the BBU leaks, gives off a bad odor, generates heat, becomes
discolored or deformed, or in any way appears abnormal during use,
recharging or storage, immediately remove it from the subsystem and
stop using it. If this is discovered when you first use the BBU, return it
to Galaxy or your system vendor.
BBU Installation Procedure
Step 1. Prior to installing the BBU module, power off the subsystem or
restart the subsystem after installation.
Step 2.
Use a screwdriver to loosen the two (2) retention screws
located on the levers on both sides (see below)
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Loosening the controller retention screws
Step 3.
Once the retention screws are loosened, gently retrieve
the controller out of the enclosure by pushing down on the
levers and pull gently.
Removing the controller out of the enclosure
Step 4.
To install the BBU module: insert the protruding edge
into the slot on the controller canister. Lower the BBU
module and mate the golden finger connector with the
board. Finally, fasten the captive screw on the module to
secure it in place.
Installing the BBU Module
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
NOTE:
It is recommended to charge your BBU for at least twelve (12)
hours on the first use.
FBM (Flash Backup Module) Installation Procedure
The FBM is an optional add-on for all models To replace a flash backup
module, please follow these steps:
Step 1. Remove controller as previously described.
Step 2. Insert a replacement flash backup module into the socket at a
fifteen (15) degree angle. When fully inserted, press the flash
backup module down until it is snapped by the retention clips.
Hard Drive Installation
Hard Drive Installation Prerequisites
Hard drives for the Galaxy HDX4 have been pre-installed in the drive
canisters. However if a drive is defective, use this procedure to install a
drive into a drive canister. Before installing hard drives, the following
factors should be considered:
Capacity (MB/GB): Use drives with the same capacity. RAID arrays use
a “least-common-denominator” approach. The maximum capacity of each
drive used in the array is the maximum capacity of the smallest drive.
Choose big drives with the same storage capacity.
Profile: The drive trays and bays of the system are designed for 3.5-inchwide x 1-inch-high hard drives.
Drive type: This model accommodates SAS or SATA-II (3Gbps) hard
drives.
MUX Board: MUX boards are required if using SATA drives in a
redundant-controller configuration both in RAID and the expansion
enclosures.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
CAUTION!
The hard drives and drive trays should only be installed into the
subsystem after the subsystem has been mounted into a rack
cabinet. If the hard drives are installed first, the subsystem will be
too heavy to handle and the possible impact during installation
may damage your drives.
WARNING!
1. Handle hard drives with extreme care. Hard drives are very
delicate. Dropping a drive against a hard surface (even from a
short distance) and hitting or touching the circuits on the
drives with your tools may cause damage to the drives.
2. Observe all ESD prevention methods when installing drives.
3. Only use screws supplied with the drive canisters. Longer
screws can damage the hard drives.
Drive Installation
Step 1.
Place the hard drive into the drive tray (as shown below),
making sure that the interface connector is facing the open
side of the drive tray, and the label side facing up.
Installing a Hard Drive
Step 2.
Adjust the drive’s location until the mounting holes in the
drive canister are aligned with those on the hard drive.
Screws holes used for the installation with or without a MUX
board are different.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Drive Locations with and without the MUX Kit
Step 3.
Secure the disk drive with four (4) of the supplied 6/32 flathead screws.
Step 4.
Once the hard drives are installed into drive trays, install all
drive trays into the enclosure. See detailed instructions in
the following section.
Drive Tray Installation
Once the hard drives have been secured within the drive trays, the drive
trays can be installed into the subsystem.
WARNING!
All drive trays must be installed into the enclosure even if they do
not contain a hard drive. If the trays are not installed into the
enclosure, the ventilation airflow will not be normalized and the
subsystem will overheat.
Step 1.
Make sure the rotary bezel lock is in the unlocked
position, i.e., the groove on its face is in a horizontal
orientation. If the groove is in a vertical position, as shown
below, then the bezel lock is locked and the front bezel
cannot be opened.
Front View of an Individual Drive Tray
Step 2.
Open the front bezel on the drive tray.) Push the
release button on the drive tray. The front bezel will spring
open.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Drive Tray Release Button
Step 3.
Align the drive tray with the slot in which you wish to
insert it making sure that it is properly aligned within the
drive bay. Gently slide it in until the drive tray reach the
end of drive bay. This should be done smoothly and
gently.
Installing a Drive Tray
Step 4.
Close the front bezel. Make sure the front bezel is closed
properly to ensure that the drive connector is properly
mated with the corresponding connector on the backplane
board. If the front bezel is not closed properly, the
connection between the hard drive and the subsystem
may come loose and mysterious drive signals may result.
Step 5.
Lock the bezel into place by turning the key-lock until
the groove on its face is pointing down (vertical
orientation) and close the front handle(s).
Securing Drive Tray by Turning the Bezel Lock
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Closing the front handles
Step 6.
Once the drive bays are populated and the subsystem
powered on, the RAID controller will automatically spin up
the hard drives and recognize their presence.
Step 7.
Once the drive bays are populated and the subsystem
powered on, the RAID controller will automatically spin up
the hard drives and recognize their presence.
Step 8.
To finish the rack mount installation, slide the Galaxy
logo’d bezel over the front of the RAID and secure with
the thumbscrews into the aligned holes of the filler plate.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Chapter 3
Subsystem Monitoring
Overview
The subsystem is equipped with a variety of self-monitoring features that
help keep system managers informed of the subsystem operational
statuses. These monitoring features provide vital feedback to help you
maintain the operational integrity of the subsystem. Prompt response to
warnings and subsystem component failure notifications will ensure data
integrity and help ensure the longevity of the subsystem.
The monitoring features include:

Firmware: The RAID controller in the subsystem is managed by
preinstalled FW, which can be accessed using a PC hyperterminal connected through the serial port. Device status
information can be obtained from the FW-embedded
configuration utility. The FW is fully described in the Operation
Manual that came with your system. Please refer to this manual
for further information.

Galaxy Array Manager: Galaxy Array Manager is a fully
integrated, Java-based, Graphical User Interface (GUI) that
came with the subsystem and can be used to monitor and
maintain the subsystem locally or remotely over TCP/IP network.
The management session is made using the 10/100BaseT
management port. The default IP address of this port is
192.168.1.129. If this address is not usable or if a different
address is required contact Rorke Tech Support. Please refer to
the Galaxy Array Manager User’s Manual for further details.

LEDs: Device-status-indicating LEDs are located on all modules.
These LEDs inform you of the integrity of a given component or a
host/management link. You should become familiar with the
various LEDs and be aware of their functions.

Audible alarm: An audible alarm is present on the subsystem
controller board and will be triggered if any of a number of
threatening events occurred.

Inter-Integrated Circuit (I2C): The I C serial bus connects
temperature sensors and presence detection circuits within the
chassis.
Status report from the expansion enclosures is
2
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
transmitted via the data links using the in-band protocols. No
additional status link is necessary.
Status-indicating LEDs
LCD Keypad Panel
The LCD keypad as shown below consists of five (5) buttons, three (3)
LEDs, and a 16x2-character LCD screen that provides access to
firmware-embedded utility. Press the ENT button for two (2) seconds on
the initial screen to enter the main menu. Press the ESC button to clear
the current event.
Function Keys:
Press the UP and DOWN arrow keys to select viewing items. In
the bottom row of the main menu, “View and Edit Event Logs,” the
most recent event is displayed first.
Mute Button:
The MUTE button silences the alarm temporarily until the next
event occurs.
The definitions of LEDs on the panel are given below.
LCD Keypad Panel
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Name
PWR
(Power)
BUSY
ATTEN
(Attention)
Color
Status
ON indicates that power is supplied to
the subsystem.
Blue
White
Red
OFF indicates that no power is supplied
to the subsystem or the subsystem/RAID
controller has failed.
FLASHING indicates that there is active
traffic on the host/drive channels.
OFF indicates that there is no activity on
the host/drive channels.
ON indicates that a component
failure/status event has occurred.
OFF indicates that the subsystem and all
its components are operating correctly.
LCD Panel LED Definitions
NOTE:
During the power-on process, the ATTEN LED will light up
steadily. Once the subsystem successfully boots up with no faults,
the ATTEN LED will turn off.
Drive Tray LEDs
Two (2) LED indicators are located on the right side of each drive tray
(see below). Refer to the table below for the LED definitions. When
notified by a drive failure message, you should check the drive tray
indicators to find the correct location of the failed drive. Replacing the
wrong drive can fail two members of a logical array (RAID 3/5) and thus
destroy data in it.
Drive Tray LEDs
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Name
Drive Busy
Color
Status
Blue
FLASHING indicates data is being
written to or read from the drive. The
drive is busy.
OFF indicates that there is no activity on
the disk drive.
Power
Status
Green
/ Red
GREEN indicates that the drive bay is
populated.
RED indicates that the disk drive has
failed.
Drive Tray LED Definitions
Controller Module LEDs
The LEDs on the rear-facing faceplate of the RAID controller are shown
below. The controller LEDs are numbered from 1 to 6. The definitions are
shown below.
Controller Module LEDs
LED no.
1
Name
Ctrl Status
Color
Green/
Amber
Status
Green indicates that the RAID subsystem is
operating healthily.
Amber indicates that a system failure has
occurred, or the controller is going through
the initialization process.
ON indicates the following:
2
C_Dirty
Amber
- Certain amounts of cached data held in
memory.
- Errors occurred with cache memory (ECC
errors).
- Cached data is sustained by battery
backup.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
- Battery voltage is lower than 2.5V.
- Battery temperature reading is abnormal
(out of the 0 to 45°C range).
- Battery is not present
OFF indicates that the cache is clean, and
that the battery backup unit is capable of
sustaining memory in case of power loss.
This signal is local to each controller.
3
Temp.
Amber
ON
indicates
that
the
detected
CPU/board/chassis
temperature
has
exceeded the higher temperature threshold.
OFF indicates that the detected temperature
reading is within the preset safe range.
4
CBM Status
Green/
Amber
Green steady on indicates the CMB module
is ready. Both a BBU and flash modules are
present. Fast blinking indicates BBU is
charging.
Amber steady on indicates CBM failure,
meaning either BBU or flash has failed. When
lit, it also indicates either BBU or a flash is
missing in a redundant-controller system.
Blinking means a BBU is being charged..
5
Hst Bsy
Green
Rapidly Blinking to indicate traffic on
the host bus.
6
Drv Bsy
Green
Rapidly Blinking to indicate traffic on
the drive channels.
-
Restore
Default
Green
Lit Green to indicate the RAID
configuration
default
has
been
successfully restored. The LED state
will be invalidated after a few seconds.
See below for how to use the push
button.
Controller LED Definitions
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
How to Use the Restore Default Button?
CAUTION!
The Restore NVRAM Default push button should be considered as
a last-resort function. Although restoring firmware defaults will not
destroy the existing logical drives; however, if the existing logical
drives cannot be adequately associated with host ID/LUNs after
default restoration, data inconsistencies might occur.
There is a non-latch type push button accessed through an opening on
the controller faceplate.
Why restore defaults?
1. Some of the latest firmware updates may be incompatible with the
firmware currently running on your subsystem. These updates may
require restoring firmware defaults before firmware upgrade can
actually take place. Before using the button, it is highly advised to
practice the following:



Stop host I/Os,
Save NVRAM,
Make a list of host ID/LUN mapping information for future
references.
You may also jot down the configuration parameters such as
the performance preferences, specific stripe sizes, etc.
2. When you upgrade controller DIMM module to 2GB. Firmware has an
embedded 1GB threshold for internal settings such as the supported
no. of logical drives. Restore firmware defaults after you upgrade your
DIMM module to 2GB.
3. Another condition that requires restoring defaults is when a system
administrator forgets the password controlling the access to a RAID
system. Before pushing this button, also practice the steps listed
above. You can access array information even without a password.
Listed below are the necessary procedures that should be
completed before using this button:
1. Before pressing this button to restore firmware defaults, it is highly
advised to save you current configuration using the “Save NVRAM”
function in firmware utility or the Galaxy Array Manager GUI.
2. You may also make a list of the existing ID/LUN mapping information.
You will need the list for restoring ID/LUN mapping after restoring
defaults. Default restoration will erase the ID/LUN mapping
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
associations (e.g., which logical drive is associated with which host
ID/LUN), and it is necessary to restore the host ID/LUN mapping after
firmware default restoration in order to access data on the previously
configured arrays.
How to use the button?
Single-controller:
After the subsystem is powered down, you can use the included bezel
key or a straighten paper clip to press the button. Press and hold the
button down, power on the subsystem, and wait for the associated LED
and the subsystem Ready LED to light up. The “Restore Def.” LED and
the firmware “Default Restored” event indicate successful restoration of
firmware defaults.
Redundant-controller:
With redundant
complicated:
RAID
controllers,
the
procedure
can
be
more
Step 1.
Remove controller B from the subsystem, power down, and
then power on with the “Restore Def.” button depressed to
restore the firmware defaults on the remaining controller.
Step 2.
When the “Restore Def.” LED is lit and the “default
restored” firmware event appears on the LCD screen,
release the button. You may ask your colleague to observe
the message on the other end of the chassis to see if the
“default restored” event appears.
Step 3.
Power down, install controller B to the controller A slot, and
repeat the restoration process.
Step 4.
When completed with restoring defaults on both controllers,
install both controllers and power on.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
iSCSI Host LEDs
There are two (2) iSCSI connections which through SFPs, connect to
switch(es) or to host(s). Each iSCSI port comes with one LED status
indicator whose statuses are described below.
10/100BaseT Management Port Indicators
Link LED
Action
Status
Green
On or
blinking
ON indicates currently connected
Blinking indicates currently active
Off
Off
No link
10G iSCSI LED Definitions
Ethernet Port LEDs
There is one (1) Ethernet port on the controller daughter board for
management purposes. Shielded Cat5e straight-through Ethernet cables
can be used to connect the RJ-45 ports to the network. Two (2) LEDs
located on each Ethernet port indicate the Ethernet connection speed and
link status. See illustrations below for status explanation.
10/100BaseT Management Port Indicators
Name
Color
Link Status
Green
LAN Activity
Green
Status
ON indicates currently connected to a
LAN.
BLINKING indicates active
transmission.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
10/100BaseT Management Port LED Definitions
PSU LEDs
Each PSU comes with a single LED at the back (see figure below),
located close to the power switch that turns on the subsystem. This LED
indicates the operational status of the PSU module. Please refer to the
PSU LED definitions shown below.
PSU Module LED
Color
Status
Steadily
Blinking
Green
The power supply has not been turned on. The
PSU module LED will blink when the subsystem is
connected to a power source but not yet turned
on.
Static Green
The PSU is operating normally and experiencing
no problem.
Static Red
The PSU has failed and is unable to provide
power to the subsystem.
OFF
The PSU is not turned on and the power cord is
disconnected.
PSU Module LED Definitions
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Cooling Module LEDs
Each individual cooling fan within the cooling module has one (1) red LED
on the PSU module. The LED corresponds to the single fan in the cooling
module. When the LED is on, it indicates the fan has failed. When the
LED is off, it indicates the fan is functioning properly.
Cooling Module LEDs and Cooling Fan
LED Color
Status
Cooling fan
LED off
When the LED is not lid, it indicates the cooling
fans are functioning properly.
Cooling fan
LED
on
(RED)
When the LED lids up RED, it indicates a cooling
fan failure.
The subsystem has a novel approach to stabilizing the temperature within
the subsystem: When the intelligent sensors on the backplane detect
elevated temperature, such as high ambient temperature or the failure of
any cooling or PSU module, the system will turn the cooling fans to high
speed to extract more heat. Once the ambient temperature cools down to
normal or the failed modules have been replaced, the cooling fans will
return to low speed.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Audible Alarm
Different environmental and operational parameters (like temperature,
etc.) have been assigned a range of values between which they can
fluctuate. If either the upper or lower thresholds are exceeded, an audible
alarm will be triggered. The alarm will also be triggered when a
component fails. If the system administrator is onsite and hears an alarm,
the manager must read the error message on the terminal or Galaxy Array
Manager screen to determine what has triggered the alarm. After
determining what has occurred, the system administrator must take
appropriate actions to rectify the problem.
WARNING!
If an alarm is triggered it is necessary for you to determine the
problem. If the audible alarm is ignored and the problem is not
rectified, unexpected damages may occur.
Failed Devices
If any of the following components fails, the audible alarm will be
triggered:

RAID controller module (in a redundant-controller configuration)

Cooling fan modules

PSU modules

BBU module

Hard disk drives

Sensors or presence detection circuitries
NOTE:
When temperature exceeds a preset threshold, the controller’s
charger circuits will stop charging. You will then receive a
message that reads “Thermal Shutdown/Enter Sleep Mode.”
When the temperature falls back within normal range, the battery
will resume charging.
I2C
The operating status of PSU and cooling fan modules are collected
2
through an I C serial bus. If either of these modules fails, the failure will be
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
detected and you will be notified through the various methods described
above.
Chapter 4
Subsystem Connection and Operation
The RAID system comes with dual 10G iSCSI host ports on each
controller. The 10G host connectivity is achieved by inserting SFP into the
SFP cages on iSCSI ports and through Fibre Channel cables.
Connection Overview: Host Connection
Prerequisites
Choosing Cables
The Fibre Channel standard allows for both copper and optical
connections. Copper cable is cheaper but limited to lengths of less than
30m (33 yards). Optical cables can be used over longer distances and
have been shown to be more reliable. Due to the demands of high
transfer rates, optical cables are preferred for 8/4Gbps fiber connectivity.
Optical cables are also less susceptible to EMI.
The Fibre host ports connect to Fibre Channel host adapters (HBA) that
feature a 10Gbps transfer rate, SFP interface, and support for full-duplex
transfer, best come with a 64-bit/133MHz PCI-X or PCI-E interface.
WARNING!
All Fibre cables are sensitive and must be handled with care. To
prevent interference within a rack system, the cable routing path must
be carefully planned and the cables must not be bent.
Lasers
CAUTION!
Lasers can be hazardous and may cause permanent eye damage or
blindness, and therefore must be treated with respect and used with
caution. Never look at lasers without confirming that they are off.
Wavelengths: The system supports SFP transceivers using lasers on
fiber optic cables emitting short wave (SW) beams (770nm-860nm).
Cables using either of these wavelengths can be used.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Laser types: Two (2) types of laser devices can be used in FC cables:
Optical Fibre Control (OFC) and non-OFC lasers. The OFC lasers are
high-powered and can be used over long distances.
Safety features: Due to their high power output, OFC lasers usually
come with a safety mechanism that switches the laser off as soon as it is
unplugged. Non-OFC lasers are low power and do not come with these
safety features; however, they can still inflict damage.
Speed Auto-detection
Speed auto-detection is specified by the Fibre Channel standard. If a
4Gbps port is connected to a 10Gbps port, it will negotiate down and run
at 4Gbps. If there are 10Gbps ports on both ends of the link, the link will
run at 10Gbps.
SFP Transceivers
An SFP transceiver converts electrical data signals into light signals and
transfers them transparently via optical fiber. A transceiver provides bidirectional data links, a laser transmitter (for fiber optic cables), LC
connector, and a metal enclosure to lower the EMI.
NOTE:
LC connectors are small form-factor, fiber-optic connectors based on a
1.25-mm ceramic ferrule with the familiar latching mechanism of the
RJ-45 modular plug and jack.
Other beneficial features of a typical SFP transceiver include a single
power supply, low power dissipation, and hot-swap capability. It is also
important that any transceiver you use meets the FC performance and
reliability specifications.
CAUTION!
The SFP transceiver from Galaxy contains a laser diode featuring
class 1 laser. To ensure continued safety, do not remove any covers
or attempt to gain access to the inside of the product. Refer all
servicing to qualified personnel.
CLASS 1
LASER PRODUCT
Port Dust Plugs
Each FC port comes with a dust plug. Remove these dust plugs only
when you are ready to insert an SFP transceiver.
Other Concerns

When selecting the number of hard drives to be included in a logical
drive, the host channel bandwidth and the mechanical performance of
individual disk drives should be considered.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
It is a good practice to calculate performance against the host port
bandwidth when designing an application topology. As diagrammed
below, if eight (8) members are included in a logical drive and this
logical drive is associated with a host ID (LUN mapping), the
combined performance of this logical drive will approximate the
channel bandwidth. If, for example, two 8-drive logical arrays are
associated with two IDs residing on a single host channel, there may
be a trade-off with performance.
If your system comes with dual controllers for a total of 4 host ports, it
will be a good practice you obtain more disk drives by attaching a
JBOD so that you can create 4 8-member logical drives. These 4
logical drives leverage the bandwidth of all 4 host ports.
Figure 3-1: Drive Mechanical Speed and Logical Drive Speed
There are other considerations. For example, a spare drive carries no
data stripes and will not contribute to disk-level performance. Refer to
the documentation for your hard drives for performance data.

When cabling, follow all the Fibre channel specifications. Pay
attention to signal quality and avoid electronic noise from adjacent
interfaces, e.g., do not lay power cords on optical cables.

The disk drives in the same logical array should have the same
capacity, but it is preferred that all the drives within a chassis have the
same capacity.

Disk drives in the same logical drive should have the same capacity,
but it is preferred that all the disk drives within a chassis have the
same capacity. Tiered storage configuration is supported, e.g., 150GB
SAS drives in your RAID enclosure and 750GB SATA drives in
JBODs. However, you should not include both SAS and SATA drives
in a logical drive.

A spare drive should have a minimum capacity that is equivalent to
the largest drive that it is expected to replace. If the capacity of the
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
spare is less than the capacity of the drive it is expected to replace,
the controller will not proceed with the failed drive rebuild.

When rack-mounted, leave enough slack in the cables so that they do
not bend to a diameter of less than 76mm (3 inches) when.

Route the cables away from places where it can be damaged by other
devices, e.g., foot traffic or fan exhaust.

Do not over-tighten or bend the cables.
Topology and Configuration Considerations
Fibre Channel Topologies
The Fibre Channel standard supports three (3) separate topologies. They
are point-to-point, Fibre Channel Arbitrated Loop (FC-AL), and fabric
switch topologies.

Point-to-Point: Point-to-point topology is the simplest topology. It is
a direct connection between two (2) Fibre Channel devices.

FC-AL: This is the most common topology currently in use. Fibre
Channel devices are all connected to a loop. Each device is assigned
an arbitrated loop physical address (AL_PA). The FC-AL supports
124 devices in a single loop.

Fabric: The fabric topology supports up to 2 Fibre Channel devices.
This topology allows many devices to communicate at the same time.
A Fibre switch is required to implement this topology.
24
Host-side Topologies
The primary concern for configuring host-side topologies is to avoid points
of failure. It is therefore recommended that the host ports be connected to
at least two (2) HBAs. It is also preferable to apply Fibre Channel
switches.
NOTE:
In order to manage the fault-tolerant data paths and to optimize data
throughput on multiple data paths, it is necessary to apply Galaxy’s
RitePath multi-pathing software.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Associated Host-side Parameters
It will be necessary to fine-tune your host-side parameters if you are
attaching the system in a complex, multi-host SAN environment. The
options can be found in terminal console with firmware in Main Menu ->
View and Edit Configuration Parameters -> Host-side Parameters. For
example, you may need to enlarge values for the following parameters:
Maximum Concurrent Host LUN Connection (“Nexus” in SCSI)
The "Max Number of Concurrent Host-LUN Connection" menu option is
used to set the maximum number of concurrent host-LUN connections.
Change this menu option setting only if you have more than four logical
drives or partitions. Increasing this number might increase your
performance.
Maximum concurrent host LUN connection (nexus in SCSI) is the
arrangement of the controller internal resources for use with a number of
the current host nexus.
For example, you can have four hosts (A, B, C, and D) and four host
IDs/LUNs (IDs 0, 1, 2 and 3) in a configuration where:
•
Host A accesses ID 0 (one nexus).
•
Host B accesses ID 1 (one nexus).
•
Host C accesses ID 2 (one nexus).
These connections are all queued in the cache and are called four nexus.
If there is I/O in the cache with four different nexus, and another host I/O
comes with a nexus different than the four in the cache (for example, host
A accesses ID 3), the controller returns busy. This occurs with the
concurrent active nexus; if the cache is cleared, it accepts four different
nexus again. Many I/O operations can be accessed via the same nexus.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Maximum Queued I/O Count
The "Maximum Queued I/O Count" menu option enables you to configure
the maximum number of I/O operations per host channel that can be
accepted from servers. The predefined range is from 1 to 1024 I/O
operations per host channel, or you can choose the "Auto" (automatically
configured) setting. The default value is 256 I/O operations.
The maximum number of queued I/O operations is 4096.
The appropriate "Maximum Queued I/O Count" setting depends on how
many I/O operations attached servers are performing. This can vary
according to the amount of host memory present as well as the number of
drives and their size. If you increase the amount of host memory, add
more drives, or replace drives with higher performance, you might want to
increase the maximum I/O count. But optimum performance usually
results from using the "Auto" or "256" settings.
For more information, please refer the firmware Operation Manual that
came with your system.
Note the following with the configuration as diagrammed below:
1. Use the 10/100BaseT Ethernet only port for management purposes,
i.e., Galaxy Array Manager or telnet console. This 10/100BaseT port
is not used for I/O transactions.
2. Configurations such as subnet or Virtual LAN can separate iSCSI host
links, decreases overheads, and eliminates the impact of link failure.
3.
Multiple arrays or logical partitions can be created and made available
separately through different IDs or LUN numbers on the host ports.
Usually, a RAID5 logical drive of 8 members often brings optimal
array performance. You may attach the expansion enclosures, the 3U
S16S-J2000 series, to expand system capacity.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
NOTE:
If you are using the Microsoft’s software initiator, please deselect the
embedded MPIO function when installing the software, for the MPIO
selection brings conflicts with Galaxy’s RitePath driver.
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Sample Topology – Single-controller with Fault-tolerant Paths
Component
Description
#
RAID system: HDX4
10G iSCSI RAID managed by a single controller, with 2
host ports
1
HBA or NIC
iSCSI initiators, better be PCI-E TOE cards
4
Software
RitePath to manage the fault-tolerant paths with
failover/failback and load balance
2
RAID configuration
4 logical partitions (created from 2 logical volumes)
2 Logical Volumes (each contains a logical drive)
2 Logical Drives (each made of 12 HDDs)
* Each logical partition appears on two different host
links for the purpose of fault tolerance. Use RitePath
multi-pathing software so that your operating system
can identify alternate paths to the same logical drive.
Single Controller with Fault-tolerant Paths
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Sample Topology – High Availability IP SAN with Redundant
RAID Controllers
Component
Description
#
RAID system: HDX4
10G iSCSI RAID managed by a dual-redundant RAID
controllers, with a total of 4 host ports
1
HBA or NIC
iSCSI initiators, better be PCI-E TOE cards
8
Software
RitePath to manage the fault-tolerant paths with
failover/failback and load balance
4
RAID configuration
4 logical partitions (created from 2 logical volumes)
2 Logical Volumes (each contains a logical drive)
2 Logical Drives (each made of 12 HDDs)
* Each logical partition appears on two different host
links for the purpose of fault tolerance. Use RitePath
multi-pathing software so that your operating system
can identify alternate paths to the same logical
partition.
High Availability IP SAN with Redundant RAID Controllers
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
NOTE:
1. In the event of single controller failure, a logical drive is accessed through
the host IDs managed by the alternate RAID controller. Host IDs and port
IPs do not fail-over to the surviving controller. Therefore, the RitePath
multi-pathing driver is necessary for path redundancy and controller
failover. On Solaris Sparc machines, use MPxIO. On Linux platforms, use
Device Mapper.
2. If you are using the Microsoft’s software initiator, please deselect the
embedded MPIO function when installing the software, for it brings
conflicts with Galaxy’s RitePath driver.
All servers in an IP SAN environment can “see” a logical partition. To
avoid access contention, you can use our Extended LUN mapping
function, VLANs, HBA port binding, NetMasks, or file-locking mechanisms.
iSCSI Topology and Host LUN Mapping:
Configuration Details:
1. A logical drive can be associated with several SCSI IDs on separate
channels making it a RAID volume accessed through different data
paths. The default ID on every host channel is ID#0. More can be
created if the need arises.
2. You can manually include or exclude specific iSCSI initiators from the
access list to your iSCSI arrays. A number of access conditioning
factors can be included: IQN, NetMask value, CHAP, and IP
addresses can be associated with a RAID array (a logical drive). In
this way, only the authorized host adapters or NICs can access your
arrays.
3. Subnet and Virtual LAN can be created to reduce overheads, to
contain broadcast, and provide access security. LAN configuration is
beyond the scope of this hardware manual.
4. Multiple arrays or multiple partitions can be created and made
available separately through different IDs or LUNs on the host ports.
The RAID volumes appear as shared storage over the Ethernet
network.
5. To ensure optimal performance, make sure you connect the iSCSI
RAID to a high speed Gigabit Ethernet network. It is recommended
you share the iSCSI storage over a dedicated Ethernet network
instead of sharing it on a clients’ network.
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Expansion Links
Note: HDX4 16 bay subsystems can connect up to 6 JBODs
Single-controller RAID to single-controller JBOD
An SFF-8088 to SFF-8088 cable is required. IN ports and OUT ports are
specified on the JBOD controller faceplates.
JBOD Expansion Links with Single-controller JBOD
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Dual-controller RAID to dual-controller JBOD.
Two (2) SFF-8088 to SFF-8088 cables are required.
Expansion Link Considerations:
1. A 120cm cable may be necessary as an expansion link if you route
the fault-tolerant cables from opposite directions. Routing cables from
opposite directions allows uninterrupted access to the disk drives in
other enclosures when one expansion enclosure fails among them.
2. A 120cm is also necessary if you have bend radius concerns in your
rack cabinet. The bend radius for SAS cables is 2.2 inches minimum.
3. The IN and OUT ports are specified on JBOD controllers’ faceplates.
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JBOD Expansion Links with Dual-controller JBOD
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Enclosure ID and Other Concerns
IMPORTANT!
MUX boards are necessary using SATA drives in a redundantcontroller configuration, both in RAID or JBOD enclosures.
These models only support SATA-II disk drives (at the 3Gbps speed).
Some disk drives may come defaulted to the 1.5Gbps speed. You
may need to configure their speed using jumpers or firmware
configuration utility. Please consult your drive vendor.
Mixing SAS and SATA drives in an enclosure is allowed; however,
there are concerns for such use:
SAS drives spin at a higher RPM, and if you place a column of
slower SATA drives in between high-RPM SAS drives, erroneous
drive behaviors may occur.
Supported and Unsupported Configurations Mixing
SAS and SATA Drives
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SAS and SATA drives come with different capacities. Do not
include drives of different capacities in a logical drive. Otherwise,
some part of the larger drives’ capacity will be wasted. Galaxy
firmware always uses the maximum capacity of the smallest drive
as the standard capacity of all member drives when composing a
logical drive.
SAS WWN addresses:
SAS expansion links are made via SAS expander chips, and
there are specific WWN addresses for the devices connected
through these chips. When making expansion, make sure
you select a unique ID using the rotary switch on JBOD.
Enclosure ID Configuration
Please note that the JBOD enclosure ID always starts from
“1.” Setting an ID to “0” may cause address conflicts with
those already occupied by SAS expander chips.
Powering On
Once all the components have been installed in the subsystem, the iSCSI
ports have been connected to the network, power on the network devices,
the subsystem, and then power on the servers/iSCSI initiators.
Check List
BEFORE powering on the subsystem, please check the following:
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
Memory Modules – Memory modules have been correctly installed
on the controller boards. You may skip this if you have not changed
the pre-installed module.

BBU Modules – If used, that the BBU module has been installed
correctly.

Hard Drives – Hard drives have been correctly installed on the
drive trays.

Drive Trays – ALL the drive trays, whether or not they have a hard
drive, have been installed into the subsystem.

Cable Connections – The iSCSI ports on the subsystem have
been correctly connected to the initiators or the Ethernet network.

Power Cords – The power cords have been connected to the PSU
modules on the subsystem and plugged into power source.

Ambient Temperature – All the subsystem components have been
acclimated to the surrounding temperature.
Power-On Procedure
When powering on the subsystem, please follow these steps.
Step 1.
Power on the network connection devices.
These devices include the Ethernet switches, routers, and
any other such devices that have been connected to the
subsystem. Please refer to the documentation that came
with your network device to see the power on procedure.
Step 2.
Power on the subsystem.
The subsystem should only be powered on after all the
network connection devices have been powered on.
Consult your network administrators for proper network
configurations. The power on procedure for the subsystem
is described below.
Step 3.
Power on the initiators.
The servers or iSCSI initiators should be the last devices
that are turned on. Please refer to the documentation that
came with your application servers to see their own power
on procedures.
Power-On Enclosure
To power on the subsystem, turn on the two power switches (for 3U
enclosures) and the power switch (for 4U enclosures) located on the rear
panel of the subsystem. For 3U models, each switch controls a single
PSU, therefore make sure that both switches are turned on. There is no
limitation on which PSU should be powered on first for 3U enclosure
models.
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Power Switches
CAUTION!
Although the PSUs are redundant and a single PSU can provide sufficient
power to the subsystem, it is advisable to turn both of the power switches
on. If only one PSU is operating and fails, system operation will be
terminated.
Power-On Status Check
Once the subsystem has been powered on, the status of the entire
subsystem should be checked to ensure that everything is running
smoothly and that there are no complications or malfunctions.

Controller Module LEDs – The controller Ready LED should flash
green.

Drive Tray LEDs – The drive status LEDs (that contain hard drives)
should all lights blue.

Firmware and Galaxy Array Manager – The overall status of the
system may be checked using the embedded firmware utility or the
Galaxy Array Manager GUI screen.

Audible Alarm - If any errors occur during the initialization process,
the onboard alarm will sound in a hastily repeated manner.
Drive tray LEDs should normally start flashing right after the power-on
self-test, indicating the RAID control unit is attempting to access the hard
drives.
NOTE:
The subsystem has been designed to run continuously. Even if a
component failure occurs the fault can be corrected online.
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Power Off Procedure
To power down the subsystem, please follow these steps:
NOTE:
When powering down the subsystem, please ensure that no timeconsuming processes, like a “Logical Drive Parity Regeneration” or a
“Media Scan,” are taking place.
Step 1.
Stop I/O access to the system.
Stop all I/O access to the subsystem. Please refer to the
related documentation of your applications.
Step 2.
Flush the cache.
Locate the Cache_Dirty LED on the back of controller
module to check if there is data cached in the memory.
Use the “Shutdown Controller” function to flush all cached
data. This prepares the RAID subsystem to be safely
powered down.
Step 3.
Turn off the power.
Turn off the power. Once the RAID subsystem has been
powered down, other devices connected to the subsystem
can be powered down.
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Chapter 5
Subsystem Maintenance and Upgrading
Overview
Maintenance
Constant monitoring and maintenance of your subsystem will minimize
system downtime and preserve the working integrity of the system for a
longer period of time. If any of the system components fails, they must be
replaced as soon as possible.
WARNING!
Do not remove a failed component from the subsystem until you have a
replacement on hand. If you remove a failed component without replacing
it, the internal airflow will be disrupted and the system will overheat causing
damage to the subsystem.
All of the following components can be replaced in case of failure:
1. Controller module
2. Memory module
3. CBM module
4. PSU modules
5. Hard drives
General Notes on Component Replacement

In a redundant-controller configuration, a RAID controller is hotreplaceable. In a single-controller configuration, the RAID controller is
not hot-swappable. All other component modules, including the PSU
modules (along with the cooling modules within), BBU, and drive
trays, are hot-swappable and can be replaced while the subsystem is
still in operation.

Qualified engineers who are familiar with the subsystem should be the
only ones who make component replacements. If you are not familiar
with the subsystem and/or with RAID subsystem maintenance in
general, it is strongly advised that you refer system maintenance to a
suitably qualified engineer.

Normalized airflow is directly dependent on the presence of all system
components. Even if a subsystem component fails, it should not be
removed from the subsystem until a replacement is readily at hand
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and can be quickly installed. Removing a subsystem component
without replacing it can lead to permanent damage.

When replacing any hot-swappable component, caution should be
taken to ensure that the components are handled in an appropriate
manner. Rough or improper handling of components can lead to
irreparable damage.

When removing a RAID controller from the subsystem, ensure that
your applications running on servers have been properly closed,
users notified of the down time, all cached writes conducted, etc.
Ensure that power has been turned off and that all precautionary
measures, without exception, are adhered to. The controller board is
very sensitive and can be easily damaged.
WARNING!
When inserting a removable module, take heed that DO NOT USE
EXCESSIVE FORCE! Forcing or slamming a module can damage the
connector pins either on the module itself or on the backplane. Gently push
the module until it reaches the end of module slot. Feel the contact
resistance and use slightly more force to ensure the module connectors are
correctly mated. If the module comes with ejection levers or retention
screws, use them to secure the module.
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Replacing a Controller Module
Overview
The controller module consists of the following components:
 DIMM Module: The DIMM module can be replaced when a DIMM
module fails or if a larger capacity DIMM is required.
 CBM : As part of the CBM module, a BBU within is usually replaced
every three (3) years. If a BBU has lost its ability to hold electric
charge, replace it with a certified module.
WARNING!
1. The BBU within the chassis is not hot-swappable. BBU is contained in a
RAID controller canister. To replace a BBU, you must remove a RAID
controller. It is recommended to remove the BBU before replacing a DIMM
module because once a controller is removed from the chassis, BBU will
discharge to support the cache memory. If you replace a DIMM module
with supplied voltage, damage may occur.
2. Replace a DIMM one (1) minute after the BBU is removed. If necessary,
replace a DIMM 1 minute after the BBU is removed.
Notes on Controller Maintenance
 Re-using the DIMM module removed from a failed controller is not
recommended unless you have a similar RAID system to test its
integrity.
 When replacing the controller module, you must remember that the
controller board is one of the most sensitive components in the system.
All previously stipulated safety precautions (see Chapter 2) must be
strictly adhered to. Failure to adhere to these precautions can result in
permanent damage and timely delays.
Removing the Controller Module
To remove the controller module:
Step 1.
Prepare a clean, static-free work pad or container to place the
controller that will be removed from the chassis.
(Step 2 and Step 3 are for the single-controller systems. Skip them if
you are replacing a system with redundant controller configuration
Step 2.
Make sure there is no data access to the subsystem to
avoid losing data. Stop all I/O accesses to the subsystem
and make sure all cached writes have been distributed to
disk drives.
This function is accessed from Main Menu -> System Functions.
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Step 3.
Power off the subsystem Power off the subsystem described
in Chapter 4. Be sure to flush all cached data before
powering off the subsystem. If it is not possible to do this
turn off both PSU modules and disconnect the power
cords.
Step 4.
Disconnect all cables that are connected to the controller
module you wish to replace.
Step 5.
Loosen the retention screws from controller. Use a
medium-size Phillips screwdriver to remove the screws
underneath each of the ejection levers. Keep the screws for
future use.
Loosening Controller Retention Screws
Step 6.
Remove the controller module by pressing down on the two
ejection levers. The controller will automatically be eased
out of the module bay. Gently pull the controller module out
of the subsystem with one hand underneath to support the
weight of the module.
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Removing the Controller Module
Replacing the Controller Module
If the controller module has failed, replace a failed controller with a
replacement from your vendor:
Step 1.
Remove the failed controller.
Step 2.
Install a DIMM module on the replacement controller, if it
does not come with a DIMM.
Step 3.
Insert the controller module. Align the controller module with
the controller module bay at the rear of the subsystem,
making sure that the levers are down. Gently slide the
controller module in.
Step 4.
Secure the connection. When the controller is reaching the
end and you feel the contact resistance, use slightly more
force to mate the controller with backplane connectors.
When the controller is almost fully inserted, use the ejection
levers to secure the controller. The levers help ensure that
the back-end connectors are properly mated.
Step 5.
Fasten the retention screws. Once fully inserted, secure the
controller module to the chassis by fastening the retention
screws through the holes underneath the ejection lever.
Step 6.
Re-attach all the cables that you previously removed. These
include the cables that connect to the local network or
iSCSI initiators that were previously attached to the iSCSI
ports.
Step 7.
a. Power up the subsystem if you are using a single-controller
subsystem.
b. With a redundant-controller subsystem, RAID controllers
should spend a short while negotiating and then deliver a
“Redundant Controller Restored” message.
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You can check for this message in the LCD screen, GUI
manager, or firmware text-based utility. When the
replacement controller is successfully brought online,
its status Ready LED should light green on its
faceplate.
Replacing or Upgrading Memory Modules
Memory Module Installation Overview

The subsystem comes with a pre-installed 2GB (or above) DDR-II
RAM DIMM module. The controller supports a memory module up to
4GB in size. If DDR-II RAM DIMM modules with a different size need
to be used or the original memory module is damaged in some way,
the pre-installed module can be removed and a replacement
installed. Replacement and installation instructions are described fully
below.

A DIMM socket is located on the controller main circuit board. The
controller board is a sensitive component and must be treated with
care.
Selecting Memory Modules
If the memory module on the controller module is going to be replaced,
the following factors must be considered when purchasing replacement
DIMM modules:

Purchasing a DIMM module: To avoid the compatibility issues, it is
recommended to contact Galaxy or your subsystem vendor for an
updated list of compatible DIMM modules. We provide tested
modules from reliable vendors with reliable chips.

DDR-II RAM DIMM modules supported: The subsystem supports
240-pin, registered, ECC-capable DDR-II RAM DIMM modules with
memory capacities ranging from 1GB to 4GB.

Installation considerations: When installing the DIMM module, it is
necessary to remove the controller module. The controller board is
more susceptible to damage than other components and must
therefore be handled with extreme care. ALL anti-static precautions
must be strictly adhered to.

Secure installation: When replacing the DIMM module, make sure
that the new DIMM module is firmly in place prior to installing the
controller module. If the DIMM module is not firmly in place, the
subsystem will not run and the controller will need to be removed and
the DIMM module correctly installed.
DIMM Module Installation
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WARNING!
The pre-installed modules must be removed prior to installing new modules.
Do this with care. Sensitive components can be damaged during the process.
Step1. Prepare an anti-static work pad or container for placing a
removed module. Use of an ESD grounding strap is highly
recommended.
Step 2. Remove the controller module.
Step 3. Remove the previously installed DIMM module from the DIMM
socket. To do this, push the white clips on either side of the DIMM
socket down. By doing this, the DIMM will be ejected from the
DIMM socket.
Step 4. Wait one (1) minute for the remaining electricity on the main
board to disperse. Remove the faulty module from the DIMM
socket. To do this, push down the white module clips on either
side of the DIMM socket. The DIMM will be ejected from the DIMM
socket
Replacing a DIMM Module
Step 5. Insert the replacement module into the DIMM socket. Make sure
the white clips of the DIMM socket are in the open positions. Align
the DIMM module with the DIMM socket by checking its “keyed”
position. Once aligned, gently and firmly push the DIMM module
into the socket. The white clips on the sides of the socket will
close automatically and secure the DIMM module into the socket.
Step 6. Reinstall the controller module. After the DIMM module has been
properly installed, install the RAID controller. To do this, align the
controller module with the controller module bay. Then gently
push the controller module into the controller bay. Carefully push
the controller until you feel the contact when the board edge
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connectors are being mated to the backplane. Do not use force. If
unusual contact resistance is felt, try it again. Use the ejection
levers to secure it into the chassis when the controller is almost
fully inserted.
When the controller is inserted with the levers at its lowest
position, notches on the levers should properly clinch to the round
anchor pins on the interior walls of module bay. You may then pull
the lever upward to secure the controller into module bay.
Step 7. Secure the controller module into the subsystem by fastening the
screws through holes underneath each ejection lever.
Replacing a Faulty BBU
The BBU can sustain cache memory in the event of a power failure or in
the unlikely event of failing both PSUs. The BBU provides additional data
security and helps minimize the chance of losing data due to power
outages.
Fault Conditions:
A BBU failure can result from the following:
1. A BBU has lost its ability to hold electrical charge. This may be the
case after the battery cells have been recharged for many times
regardless of how long the module has been used. Therefore, a
stable power source is important for system operation.
2. The charger circuitry implemented with the controller has failed.
There are other conditions that might trigger the BBU fault events and
trigger the CBM status LED to light up:
1. The temperature sensor embedded with the subsystem’s charger
circuit reports a temperature reading exceeding the preset threshold.
The charger circuits will enter a low-power and self-protection state.
2. A BBU module has been charged for over twelve (12) hours. A timer
is embedded with the charger. When this occurs, the charger will
enter a timer fault state. The fault condition usually occurs with a
brand new BBU or with a totally discharged BBU. Charging will
resume automatically if you remove and re-install the BBU module.
BBU Warnings and Precautions

Install or replace the BBU with BBUs supplied by your vendors only.
Use of battery cells provided otherwise will void our warranty.

Always dispose of a replaced battery in an ecologically responsible
manner. Dispose of used BBUs at authorized battery disposal sites
only.

Do not use nor leave the BBU near a heat source. Heat can melt the
insulation and damage other safety features of battery cells, possibly
will cause acid leak and result in flames or explosion.
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
Do not immerse the BBU in water nor allow it to get wet. Its protective
features can be damaged. Abnormal chemical reactions may occur,
possibly cause functional defects, acid leak, and other hazardous
results.

Do not disassemble or modify the BBU. If disassembled, the BBU
could leak acid, overheat, emit smoke, burst and/or ignite.

Do not pierce the BBU with a sharp object, strike it with a hammer,
step on it, or throw it. These actions could damage or deform it and
internal short-circuiting can occur, possibly cause functional defects,
acid leak, and other hazardous results.

If a BBU leaks, gives off a bad odor, generates heat, becomes
discolored or deformed, or in any way appears abnormal during use,
recharging or storage, immediately remove it from the subsystem and
stop using it. If this is discovered when you first use the BBU, return it
to Galaxy or your subsystem vendor.
Replacing a Faulty BBU
*Single controller models, must power down the system if BBU was
purchased as an option accessory..
To replace the BBU, please follow these steps:
Step 1. Remove the faulty BBU from the chassis. The BBU module is located
within the controller canister. Loosen the retention screws underneath the
levers and pull out the controller. Loosen the captive screw at the end of
BBU to remove the faulty.
Remove the screws from the controller faceplate and push down on the
levers
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Remove the BBU Module
Step 2. Install the replacement BBU. Insert the protruding edge
into the
slot on the controller canister. Lower the BBU module and mate
the golden finger connector with the board.
Step 3. Secure the BBU module to the enclosure. Fasten the captive
screw on the module.
Step 4. Check subsystem CBM LED status for replaced BBU status.
*Single controller models, need to power on the subsystem after
replacement.
NOTE:
1. A new or replacement BBU takes approximately twelve (12) hours
to charge to its full capacity. Reset the subsystem whenever a BBU
is replaced or added in order for the replacement module to take
effect.
2. The life expectancy of a BBU is three (3) years. Follow the
procedures above to replace a used BBU in order to maintain the
fault tolerance feature.
3. The chance of BBU charger failure is comparatively low. If the
cause of a failure cannot be determined even after a BBU module
is replaced, contact your system vendor for a replacement
controller and return the controller module through Galaxy’s
standard RMA procedure.
Replacing a Faulty Flash Backup Module (FBM)
The FBM is an optional add-on for the model. If previously purchased and
wanting to replace the flash backup module, please follow these steps
(skip Step 2 if you are installing for the first time):
Step 1.
Remove controller as previously described.
Step 2.
Remove the faulty flash backup module from the charger
board using the index fingers from both hands to pull the
retention clips away from the flash backup module. If the
flash backup module does not easily disengage, use your
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finger nails to pick it up. Once released, the flash backup
module will pop up. You can then remove it from the socket.
Step 3.
Insert a replacement flash backup module into the socket at a
fifteen (15) degree angle. When fully inserted, press the
flash backup module down until it is snapped by the
retention clips.
Installing Flash Backup Module into a Controller
Replacing a Faulty PSU
Notes on PSU Module Maintenance

Redundant, load-sharing PSU modules: The system comes with
two fully redundant, hot-swappable PSU modules.

PSU canister: Each PSU module is housed in a robust steel
canister, with the power supply converter unit in the front and two
serially-aligned cooling fans in the rear section. When the PSU is
removed from the chassis, the cooling module is also removed.

Immediate replacement: When a PSU fails, it should ideally be
replaced immediately. Do not remove the PSU module unless a
replacement is readily available. Removing a PSU without a
replacement will cause severe disruptions to the internal airflow and
the system will overheat, possibly causing irreparable damage to
some of the system components.
WARNING!
Although the system can operate using a single PSU module, it is not
advisable to run the system with a single PSU module for an extended
period of time.
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Replacing the PSU Module
To replace a PSU, please follow these steps:
Step 1.
Power off the PSU. The power switch is located on each
PSU’s rear-facing panel (does not apply to the 4U PSU as
there is only one switch).
Step 2.
Disconnect the power cord that connects the PSU to the
power source.
Step 3.
Loosen the retention screw that secures the extraction
handle to the chassis using a Phillips screwdriver. See
below drawing for its location.
PSU Parts Identification
Step 4.
To remove the PSU module by pulling the extraction handle
upwards, as shown as #1 in the figure below. The extraction
handle should gracefully disconnect the PSU from the
backplane connectors. Once dislodged, gently pull the PSU
module out of the system, as shown as #2 in the figure below.
If the system is mounted in a rackmount rack, use another
hand to support its weight while removing the module
WARNING!
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1. When a PSU is removed form the chassis, the cooling module is also
removed from the chassis.
2. It is recommended that the replacement procedure is completed in less
than five (5) minutes to prevent the subsystem from overheating.
Step 5.
To install the replacement module: Make sure the extraction
handle is held at its up-most position so that the saddle
notches on the sides of the handle can snap onto the metal
anchor pins along the interior walls of the PSU slot. Push
the PSU into chassis, and when you feel the contact
resistance, push the handle downward to secure the
module.
Step 6.
Secure the PSU to the subsystem by fastening the retention
screw through the PSU ejection handle.
Step 7.
Replace the power cord that connects the PSU module to the
mains.
Step 8.
Power on the PSU module.
Cooling Module Maintenance
Notes on Cooling Module Maintenance

Redundant cooling modules: The subsystem is equipped with four
(4) cooling fan, two (2) within each PSU and cooling fan combo
module. These cooling modules control the internal operating
temperature of the subsystem and therefore their working integrity
should be maintained at all times.
Although the cooling modules are fully redundant, it is not advisable
to run the subsystem with fans in a single PSU module for an
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extended period of time. If the cooling fans in the only remaining PSU
module fail, the subsystem will quickly overheat.

Detecting a failed cooling module: If a cooling module fails, the
LEDs located at the back of the PSU module, an audible alarm, the
firmware, and the Galaxy Array Manager software can notify you.

Replacing a cooling module: Once you are notified that a cooling
module has failed, it should be replaced as soon as possible. A failed
cooling module should only be removed from the subsystem when
you have a replacement module immediately available.
Replacing a Cooling Module
If one of the cooling modules fails, it must be replaced as soon as
possible. The cooling module is secured to the PSU module with the six
(6) screws from the top. To replace the cooling module, follow the steps
below:
WARNING!
The fan replacement process should be completed within five (5) minutes. If
the process takes too long, the accumulated heat can damage the
subsystem.
Cooling modules are situated within the PSU and are not user serviceable.
To rectify cooling module failures, a complete PSU unit must be swapped
out. Please contact your system vendor or Galaxy to acquire a
replacement PSU.
Replacing a Hard Drive
Hard Drive Maintenance Overview
•
Hot-swappable drive trays: The drive trays are all hot-swappable. A
disk drive failure can be corrected online.
•
Handles: If the failed hard drive is behind either the left or right front
handle, unfold the handles to open the front access to the drive trays.
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Step 1.
Open the front bezel: Once the front bezel on the drive
tray has been opened, the drive tray must be removed from
the subsystem.
CAUTION!
Failure to remove a healthy drive from the subsystem after the front bezel
has been opened can cause data errors.
Step 2.
Slowly remove a faulty drive: When removing a drive tray
from the subsystem, pull the drive tray out only about
one inch and then wait for at least 30 seconds for the
hard drive motor to spin down before taking it out
completely.
There are situations that healthy drives can be removed. In
operations such as Copying & Replacing member drives
with drives of larger capacity, you may need the replaced
disk drives in other installations.
Step 3.
Keep a replacement on hand: If a hard drive has failed,
make sure you have a replacement drive readily available
before removing the failed drive from the subsystem. Do not
leave the drive bay open for an extended period of time or
the normalized airflow will be disrupted and system
components will overheat damaging the system.
Replacing a Hard Drive
To replace a hard drive, please follow these steps:
Step 1.
Identify the location of the drive tray that contains a hard
drive indicated as faulty. You may use firmware utility or
Galaxy Array Manager software to locate a faulty drive. The
drive tray LED should also light red.
Step 2.
Use a flatblade screwdriver to turn the rotary bezel lock to
the unlocked position, i.e., the groove on its face is in a
horizontal orientation.
Opening the Front Flap
Step 3.
Open the tray bezel by pushing the release button. The
front bezel will automatically swing open.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Opening the Drive Tray Front Bezel
Step 4.
Remove the drive tray by pulling it one inch away from
the drive bay. Wait for at least 30 seconds for the disk
drive to spin down (if the disk drive is removed for a
different purpose, e.g., cloning the members of a
logical drive or Copy & Replace), and then gently and
carefully withdraw the drive tray from the chassis.
Step 5.
Remove the four (4) retention screws that secure the
hard drive from the sides of the drive tray (two on each
side.)
Loosening the Hard Drive Screws
Step 6.
Install the replacement hard drive. Please refer to the
complete hard drive installation procedures in Chapter 2.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Appendix A
Specifications
Technical Specifications
Environmental Specifications
Humidity
5 to 95% (non condensing – operating and non-operating)
Temperature
Operating: 0º to 40ºC (35ºC if BBU is applied)
Non-operating: -40º to 60ºC
Altitude
Operating:
Sea level to 3660m (12,000 ft.)
Non-operating: Sea level to 12,192m (40,000 ft.)
Power Requirements
Input Voltage
100VAC @ 10A to 240VAC @ 5A with PFC (auto-switching)
Frequency
47 to 63Hz
Power
Consumption
530W
Dimensions
With Forearm Handles
Without Forearm Handles
Height
131mm (5.2 inches)
130mm (5.1 inches)
Width
482.6mm (19 inches
445mm (17.5 inches
Depth
531.64mm (20.9 inches)
514.04mm (20.1 inches)
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Certifications
Safety
UL (60950-1 2’nd)
BSMI
CNS 14336: 2005
CB
IEC 60950-1, 2’nd Edition
GOST-R
GOST R 60950-1-2005
EMC
CE
EN
EN
EN
EN
55022: 2006/A1:2007
61000-3-2: 2006
61000-3-3: 1995/A1: 2001 /A2: 2005
55024: 1998/A1: 2001/A2: 2003
BSMI (CNS 13438)
FCC (FCC Part 15,subpart B )
Certificates
IEC 60068-2,
MIL-STD-810E/883E,
ISTA,
ASTM-D3332,
IPC-TM-650
IEC 61000-4-2:1995/A2:2000
IEC 61000-4-3:1995/A2:2006
IEC 61000-4-4:2004
IEC 61000-4-5:2005
IEC 61000-4-6:2003/A1:2004/A2:2006
IEC 61000-4-8:1993/A1:2000,
IEC 61000-4-11: 2004
IEC 61000-3-2, IEC61000-3-3
ISO7779/3744
RoHS
Microsoft WHQL-Windows Server 2003
Shock
Half-sine
Operating: 5G peak, 11ms duration
Non-operating: 15G, 11ms duration
Vibration
Operating
Non-operating
0.5oct/min, 5 to 500Hz, sinewave, 0.2G
0.5oct/min, 5 to 500Hz, sinewave, 1.0G
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Warning Alarms
Audible alarms
System LEDs
Galaxy Array Manager management suite
LCD screen
Event notifications sent over email, fax, LAN broadcast, SNMP traps, MSN
messenger, SMS short messages
Controller Specifications
Configuration
Specification
Host O/S
Compatibility
0, 1(0 + 1), 3, 5, 6, 10, 30, 50, 60, JBOD, and non-RAID
disk spanning
Host O/S independent; also dependent on iSCSI offload
utilities and hardware
Host Interface
10G iSCSI + SFP
Host Channels
2 pre-configured host channels
Drive Interface
Supports up to 16 channels of 6Gb/s SAS or 3Gb/s SATA
Drive Channels
All drive channels are pre-configured and cannot be
changed
Cache Mode
Write-through, write-back, and adaptive write policy
Cache Memory
Pre-installed 2GB (or above) DDRII module with ECC,
registered; in one DIMM socket
Number of LUNs
Up to 32 per host ID; depends on DIMM size
RAID Levels
Multiple Target
IDs/Host Channel
Firmware on Flash
Memory
Yes
Yes
Drive Hot-swap
Yes; with transparent reset of non-responsive drives
Controller Hot-swap
capability
No
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Architecture
Specification
CPU
750GL-800MHz
Host channel Chip
Intel 82599 x 1
DIMM Slot
For one 240-pin DDRII SDRAM module
ASIC
Galaxy ASIC667 64-bit chipset
Flash ROM
64Mbit (8MB)
Hardware XOR
Yes
Real-time Clock
For event messages with time record and task scheduling
Power Supply Specifications
Specification
Nominal Power
530W with active PFC
DC Output
12.0V: 25A (Max.)
5.0V: 43A (Max.)
Efficiency
80plus
Input Frequency
47 to 63Hz
AC Input
100VAC @ 10A to 240VAC @ 5A with PFC
Power Factor
Correction
Hold-up Time
Over-temperature
Protection
Cooling Fans
Yes
At least 20ms at 115/230VAC full load after a loss of AC input
Auto shutdown when lost cooling or exceeded ambient
temperature; over-voltage protection is also available.
No fans specific for PSU; heated air is drawn by the cooling
fan module fixed in the rear section of PSU.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
RAID Management
Specification
•
•
•
Configuration
•
•
Performance
Monitoring
Remote Control and
Monitoring
Text-based firmware-embedded utility over RS-232C
through a DB-9 male to DB-9 female serial cable
LCD keypad panel
The Galaxy Array Manager program using the
management port (10/100BaseT) or in-band
connection over host links.
Menu-driven, text-based firmware-embedded utility via
telnet
http session with Embedded Web GUI that resides in
controller flash
Yes
Yes using Ethernet
IP 192.168.1.129
Event Broadcast/Alert
Yes (via Galaxy Array Manager sub-modules, the
Notification Manager utility, or the firmware-embedded
browser-based Web GUI)
Hardware Connection
over Ethernet or RS-232C
Configuration on Disk
Failure Indicator
Configuration data stored on disks for logical drive
assemblies to exist after controller replacement; basic
settings, e.g., channel mode settings, are stored on
NVRAM. Applies to uses such as Drive Roaming.
Via audible alarm, system LEDs, LCD keypad panel,
Galaxy Array Manager session, event messages, or
terminal emulation screen
Fault Tolerance Management
Specification
Drive S.M.A.R.T. support
Yes, with user-configurable detect-only, cloneand-replace, and perpetual-clone options. The
S.M.A.R.T. feature depends on HDD
implementation.
CBM (Cache Backup Module)
Yes
Sensors and Module Presence
2
detection through an I C serial
bus.
Yes, reported to firmware. Events occurred in
JBODs are reported through SES commands via
the SAS data links back to the managing RAID
enclosure.
Automatic Drive Failure
Detection
Automatic Rebuild on Spare
Drives
Regenerate Logical Drive
Parity
Bad Block Reassignment
Yes
Yes
Yes
Yes
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Automatic Rebuild upon Failed
Drive Replacement
Manual Clone of Suspected
Failed Drive
Concurrent Rebuild on Multiple
Drives in a RAID (0 + 1) or
RAID6 Logical Drive
Event-triggered operation
Yes
Yes
Yes
Firmware applies conservative write-through
operation in the event of module failures, and
raises fan rotation speed.
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Appendix B
Pin-outs
SFP FC Port Pin-outs
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Pin
Pin Name
Pin Description
1
VEET
2
TFAULT
3
TDIS
4
MOD_DEF(2)
5
MOD_DEF(1)
6
MOD_DEF(0)
7
No Connect
Internal pullup 30KΏ to Vcc
8
RX_LOS
Indicates loss of signal; High indicates
loss of received optical signal
9
No Connect
Internal
10
VEER
Receiver Ground
11
VEER
Receiver Ground
12
RD-
Inverse Received DATA Out
13
RD+
Received Data Out
14
VEER
Receiver ground
15
VCCR
Receiver power +3.3V
16
VCCT
Transmitter power +3.3V
17
VEET
Transmitter ground
18
TD+
Transmitter DATA In
19
TD-
Inverse Transmitter Data In
20
VEET
Transmitter Ground
Transmitter ground
Transmitter fault indication – High
indicates a fault condition
Transmitter Disable – Module electrical
input disables on high or open
Module definition 2 – Two wire serial ID
interface data line (SDA)
Module definition 1 – Two wire serial ID
interface clock line (SCL)
Module definition 0 - Grounded in module
(module present indicator)
pullup 30KΏ to Vcc
SFP Port Pin-out Definitions
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Ethernet Management Port Pinouts
Ethernet Port Pinouts
Pin
Pin Name
Pin
Pin Name
1
LAN_TXP
5
N2
2
LAN_TXN
6
LAN_RXN
3
LAN_RXP
7
N1
4
N2
8
N1
Ethernet Port Pinout Definitions
DB-9 Serial Port
COM1 Serial Port
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Pin
Pin Name
Description
1
DCD1
Data Carrier Detect
2
RXD1
Receive Data
3
TXD1
Transmit Data
4
DTR1
Data Terminal Ready
5
GND
Ground
6
DSR1
Data Set Ready
7
RTS1
Request to Send
8
CTS1
Clear to Send
9
RI1
Ringing indicator
Serial Port Pinout Definitions
For a single-controller system, there is no included cable for this serial
port. The serial cable is user-supplied.
SAS Expansion Port Pinouts
The Mini SAS host ports comply with SFF-8088 specification.
Mini SAS SFF-8088 Connector
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Galaxy GHDX4 RAID iSCSI-SAS/SATA Installation and Hardware Reference Manual
Pin
Description
Pin
Description
A1
GND
B1
GND
A2
RX0+
B2
TX0+
A3
RX0-
B3
TX0-
A4
GND
B4
GND
A5
RX1+
B5
TX1+
A6
RX1-
B6
TX1-
A7
GND
B7
GND
A8
RX2+
B8
TX2+
A9
RX2-
B9
TX2-
A10
GND
B10
GND
A11
RX3+
B11
TX3+
A12
RX3-
B12
TX3-
A13
GND
B13
GND
SAS Expansion Port Pinout Definitions
Power
IEC-type receptacle.
99
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