D-Link DSN-2100-10 - xStack Storage Area Network Array Hard Drive Hardware reference guide

xStack Storage TM
D-Link xStack Storage iSCSI SAN Array
Managed SAN Solution
DSN-2100
Hardware Reference Guide
Version 1.0
© 2008 D-Link Networks, Inc. All Rights Reserved
D-Link Systems, Inc. makes no warranty of any kind with regard to this material, including,
but not limited to, the implied warranties of merchantability and fitness for a particular
purpose. D-Link Systems, Inc. shall not be liable for errors contained herein or for incidental
or consequential damages in connection with the furnishing, performance, or use of this
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This document contains proprietary information, which is protected by copyright. No part of
this document may be photocopied, reproduced, or translated into another language without
the prior written consent of D-Link Systems, Inc.
The information is provided “as is” without warranty of any kind and is subject to change
without notice. The only warranties for D-Link products and services are set forth in the
express warranty statements accompanying such products and services. Nothing herein
should be construed as constituting an additional warranty. D-Link shall not be liable for
technical or editorial errors or omissions contained herein.
Copyright © 2008 D-Link Systems, Inc.™
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D-Link Systems, Inc.
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ii
Safety Information
There is a danger of a new battery exploding if it is incorrectly installed.
Replace the battery pack only with the same or equivalent type recommended
by the manufacturer. Do not dispose of the battery along with household waste.
Contact your local waste disposal agency for the address of the nearest battery
deposit site.
This product also uses a lithium coin cell battery. The lithium coin cell battery is a long-life
battery, and it is very possible that you will never need to replace it. However, should you
need to replace it, consult your service documentation. Do not dispose of the battery along
with household waste. Contact your local waste disposal agency for the address of the
nearest battery deposit site.
Following are the safety agency certifications that the xStack Storage enclosure has met:
CSA 60950-1
UL 60950-1
IEC 60950-1
EN 60950-1
Compliance Information
FCC Class A
CE Class A
C-Tick Class A
VCCI Class A
Notice of Export Controls
Export of technical data contained in this document may require an export license from the
United States government. Please contact D-Link Systems, Inc. for any export compliance
questions.
DSN-2100 Hardware Reference Guide
iii
Document Revision Level
iv
Revision
Date
Version 1.0
October 10, 2008
Notes
Preface
This document is intended to assist users with installing the xStack Storage system from DLink. This document assumes that users are computer literate, familiar with Storage Array
Products, and have a basic understanding of storage products and concepts.
Typographic Conventions
Notes
Notes provide information that deserves special attention. They are preceded by:
Cautions
Cautions contain information which, if not followed, can cause damage to the
xStack storage system. They are preceded by:
Warnings
Warnings contain information which, if not followed, can cause damage to the
xStack storage system and to the person installing it. They are preceded by:
Related Documentation
In addition to this document, the following documents are available from D-Link.

xStack Storage Management Center Software User's Guide. This guide provides the
information needed to configure and manage storage on the xStack Storage system using
the xStack graphical user interface.
DSN-2100 Hardware Reference Guide
v
Contact Information
You can find software updates and user documentation on the D-Link website.
D-Link provides free technical support for customers within the United States and within
Canada for the duration of the warranty period on this product.
U.S. and Canadian customers can contact D-Link Technical Support through our website, or
by phone.
Tech Support for customers within the United States:
D-Link Technical Support over the Telephone
Please see our support site for current number:
 http://support.dlink.com
 Monday to Friday 8:00am – 5:00pm PST/PDT
D-Link Technical Support over the Internet:
 http://support.dlink.com
Tech Support for customers within Canada:
D-Link Technical Support over the Telephone
Please see our support site for current number:
 http://support.dlink.ca
 Monday to Friday 7:30am to 9:00pm EST/EDT
D-Link Technical Support over the Internet:

vi
http://support.dlink.ca
Contents
Contents
Chapter 1
Introduction ..................................................................................................................................9
1.1
1.2
1.3
Chapter 2
DSN-2100 Layout .......................................................................................................................11
2.1
2.2
2.3
Chapter 3
Model .............................................................................................. 9
Benefits and Features ........................................................................... 10
System Overview ................................................................................. 10
Front Panel Components ........................................................................ 12
Rear Panel Components ......................................................................... 14
Side and Bottom Panel Components .......................................................... 16
Installing the DSN-2100 Storage System ...............................................................................17
3.1
3.2
3.3
3.4
3.5
3.6
3.7
Site Considerations............................................................................... 18
3.1.1 General Considerations ................................................................ 18
3.1.2 Desktop, Floor or Shelf Installation.................................................. 18
3.1.3 Rack-mount Guidelines ................................................................ 19
Unpacking the DSN-2100 Storage System .................................................... 19
Items Supplied by the User ..................................................................... 20
Connecting to the iSCSI Data Ports............................................................ 21
3.4.1 Connecting to the DSN-2100 Host Network Connection Ports................... 21
Connecting to the Management Port.......................................................... 21
Connecting the Power Cords ................................................................... 22
Powering-on the DSN-2100 Storage System.................................................. 22
Appendix A Replacing and Upgrading FRUs..............................................................................................23
A.1
A.2
A.3
A.4
A.5
Installing the Battery Pack...................................................................... 23
Installing Memory................................................................................. 26
Installing or Replacing SATA Drives ........................................................... 28
Replacing a Fan................................................................................... 33
Replacing a Power Supply....................................................................... 35
DSN-2100 Hardware Reference Guide
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This Page Left Intentionally Blank
viii
Contents
Chapter 1 Introduction
The DSN-2100 storage system is an intelligent, high-performance multiple Gigabit Ethernet
storage solution designed for small businesses that want to improve the reliability,
availability, serviceability, and performance of their storage systems. It provides a range of
benefits and features from its ability to use familiar, proven, and widespread networking
technologies like IP and Ethernet for storage solutions.
Based on an Internet Protocol-Storage Area Network (IP-SAN) architecture, the DSN-2100
storage system is built around an iSNP8008 System-On-A-Chip, with the following features:

Up to 8 internal Serial Advanced Technical Attachment (SATA) drives

Up to 512 MB of system memory

Up to 4 GB of buffer (cache) memory

Four 1GbE local-area network (LAN) connectors accessed via the back panel

A 10/100 Mbps management port

An RS-232-C DB9 diagnostic port for troubleshooting purposes
Complete configuration and management are available through the intuitive, graphicalbased xStack Storage Management Center.
For the latest information about supported drives, consult the
Interoperability Matrix found on the D-Link Support Web site:
support.dlink.com
1.1
Model
The DSN-2100 storage system is presently available as a single model.
Table 1-1. DSN-2100 Model Number
Model
Host Network Interface
Maximum Number of
Internal SATA Drives
DSN-2100-10
Four 1GbE data ports
8
DSN-2100 Hardware Reference Guide
9
1.2
1.3
Benefits and Features

High-performance, low-latency iSCSI storage system, with a highly integrated, reliable,
multifunction ASIC for fully featured, integrated storage virtualization

Modular design with expansion up to 8 SATA disk drives

Easy setup and configuration – can be placed anywhere on a 10BaseT, 100BaseT, or
Gigabit Ethernet network for improved access to critical information

In-band or out-of-band management via a direct connection or the Web

Delivers Ethernet economics to storage for lower total cost of ownership and rapid
deployment using known and trusted technologies

Proven transport infrastructure for increased reliability, investment protection, and
reduced training costs

Scalability over long distances - ideal for remote data replication and disaster recovery

Three internal fans provide cooling

Battery pack ensures that a charged battery is on hand to preserve buffer cache
contents if a power failure occurs. Contents are backed up for approximately 72 hours.
System Overview
Figure 1-1 shows a typical DSN-2100 storage system configuration in a Storage Area Network
(SAN). The SAN shown is an Ethernet network used solely for exchanging data between the
customer's servers and the DSN-2100 storage system. The Ethernet bandwidth used by the
servers exchanging data with the DSN-2100 storage system can be very high. Using a
separate Ethernet to act as a SAN keeps that data from interfering with the customer's
existing LAN and improves security.
Figure 1-1 DSN-2100 Storage System Diagram
10
Chapter 1 Introduction
Chapter 2 DSN-2100 Layout
This chapter describes the hardware components on the DSN-2100 storage system. The
topics covered in this chapter are:

Section 2.1, Front Panel Components

Section 2.2, Rear Panel Components

Section 2.3, Side and Bottom Panel Components
DSN-2100 Hardware Reference Guide
11
2.1
Front Panel Components
The front of the DSN-2100 storage system has the following components:

Power LED – shows the DSN-2100 power on status. (see Figure 2-1 and Table 2-1)

Boot and Fault LED – shows whether the DSN-2100 is ready for operation or encountered
a fault condition. (see Figure 2-1 and Table 2-1)

A lock on the bezel that protects access to the drives inside the unit.

The hard drive power and drive activity/fault LEDs. (see Figure 2-1 and Table 2-2)
Figure 2-1 Front View of the DSN-2100 Storage System
When installed, the front bezel uses pipes to pass light from the LEDs behind
it to the front for viewing. The bezel itself is passive and has no active LEDs.
12
Chapter 2 DSN-2100 Layout
Table 2-1. Front Panel LEDs
LED
Power
Color
Description
Green
ON = DSN-2100 is powered on.
OFF = power is not being received.
Boot and Fault
OFF
Array is powered off or performing its Power On Self Test.
Red
ON = a fault has occurred.
Green
ON = normal operation.
Table 2-2. Hard Drive LEDs (for each drive 0 through 7)
LED
2.1.1
Color
Description
Drive Power
Blue ON
Drive is powered and operational.
Drive Activity
and Fault
Green Blinking
Data being transmitted or received from corresponding SATA drive.
Red ON
Drive has experienced a fault and is offline
Front Vents
The enclosure that houses the xStack Storage Array contains a set of three hot-swappable
fans located in the mid-section of the chassis drawing air into vents in the front of the unit,
cooling the hard drive array and other components. This air exits the chassis through a grill
located at the rear of the chassis. It is advised that the unit only be operated with the top
cover in place. When installing the xStack Storage Array, please be sure these vents are not
blocked.
A fully loaded array with all drive bays filled can generate a significant
amount of heat. Please be sure the cover is in place to provide the forced
air flow required for proper cooling.
DSN-2100 Hardware Reference Guide
13
2.2
Rear Panel Components
The rear of the DSN-2100 storage system enclosure has the following components:

Four 1 GbE RJ-45 iSCSI host network data ports. Each iSCSI data port has port speed and
port activity LEDs. (see Figure 2-2, Figure 2-3 and Table 2-4)

Diagnostic port (Diagnostic Port) - one 9600 bps RS-232-C DB9 diagnostic port is located
to the right of the iSCSI data ports. This requires a female-to-female straight-through
cable provided with the system. (see Figure 2-2 and Figure 2-3)

Management port (Mgmt 10/100) - one 10/100 RJ-45 management is located to the right
of the diagnostic port. The management port has port speed and port activity LEDs. (see
Figure 2-2, Figure 2-3 and Table 2-5)

Power switch and reset switch – are located to the left of the power supply (see Figure
2-2, Figure 2-4 and Table 2-3).

Power - two power receptacles are located on the right side of the rear panel.

Power supply alarm silence button – located on the rear of the power supply. (see
Figure 2-2)
Power Supply Alarm
Silence Button
Figure 2-2 Back View of the DSN-2100 Storage System
14
Chapter 2 DSN-2100 Layout
Figure 2-3 Close-Up View of the DSN-2100 Rear Panel
Figure 2-4 Power and Reset Switches
Table 2-3 Rear Panel Switches
Switch
Description
Power
Applies power to the DSN-2100 storage system. Pressing this switch for longer than 3 seconds removes
power from the DSN-2100 storage system and turns it off.
Reset
Resets the DSN-2100 storage system.
DSN-2100 Hardware Reference Guide
15
Table 2-4. Data Port Speed and Port Activity LEDs
LED
Port Speed
Color
Yellow
Description
ON = link is operating at 1 Gbps.
OFF = link is operating at either 10 Mbps or 100 Mbps.
Port Activity
Green
ON = link is operational.
Blink = data is being sent or received.
Table 2-5. RJ-45 Port Activity LEDs for the Fast Ethernet Management Port
Color
2.3
Description
Green ON
Link is operational.
Green Blinking
Data is being transmitted or received on the RJ-45 port.
Yellow OFF
Connection has been established at 10 Mbps.
Yellow ON
Connection has been established at 100 Mbps.
Side and Bottom Panel Components
The left and right sides of the DSN-2100 storage system enclosure has rails for rack-mounting
the unit. Product information labels will be found on the side, bottom, or back of the unit.
For rack-mount instructions, refer to the documentation for the rack.
16
Chapter 2 DSN-2100 Layout
Chapter 3 Installing the DSN-2100 Storage System
This chapter describes how to install the DSN-2100 storage system. The topics covered in this
chapter are:

Section 3.1, Site Considerations

Section 3.2, Unpacking the DSN-2100 Storage System

Section 3.3, Items Supplied by the User

Section 3.4, Connecting to the iSCSI Data Ports

Section 3.5, Connecting to the Management Port

Section 3.6, Connecting the Power Cords

Section 3.7, Powering-on the DSN-2100 Storage System
DSN-2100 Hardware Reference Guide
17
3.1
Site Considerations
The site where you install the DSN-2100 storage system can affect its performance.
Therefore, choose a site that conforms to the requirements in the following sections.
3.1.1
General Considerations
Observe the following considerations when selecting a location to install the DSN-2100
storage system.
3.1.2

The location should be fairly cool and dry for the acceptable temperature and humidity
ranges.

The location should be free of strong electromagnetic field generators (such as motors),
vibration, dust, and direct exposure to sunlight.

The location must provide sufficient airflow to the front and back of the DSN-2100
storage system for correct cooling. Ventilation must be sufficient to exhaust heat from
the rear of the equipment.

The location should offer a power outlet within six feet (1.82 meters) of the DSN-2100
storage system.

The location should allow for at least six inches (152.3 mm) of space at the front and
back of the DSN-2100 storage system for ventilation.

Do not place the DSN-2100 storage system next to, on top off, or below any device that
generates a significant amount of heat or will block the fee flow of air through the DSN2100 ventilation slots.
Desktop, Floor or Shelf Installation
The DSN-2100 storage system can be mounted on a desktop or shelf. Observe the following
considerations for desktop or shelf installations.
18

Select a sturdy, level surface that can support the DSN-2100 storage system. A fully
populated unit weighs approximately 45 lbs. (20.4 kg.).

Allow enough ventilation space between the DSN-2100 storage system and any other
objects in the vicinity.

Be sure not to block the air vents on the front and back of the DSN-2100 storage system
enclosure. Install the cables and power cords according to the procedures in the
following sections.
Chapter 3 Installing the DSN-2100 Storage System
3.1.3
Rack-mount Guidelines
The DSN-2100 storage system can be mounted in a standard 19-inch rack. Observe the
following considerations for rack installations. For information about installing the system in
a rack, refer to the documentation for the rack.
3.2

All rack-mounting hardware must be carefully assembled to properly support the
equipment. Follow the instructions in the documentation for the rack.

The operating ambient temperature of rack-mounted equipment must not exceed the
maximum rated ambient temperature indicated in this guide.

The rack cabinet must provide sufficient airflow to the front and back of the DSN-2100
storage system to maintain correct cooling. It must include ventilation sufficient to
exhaust the heat generated by equipment installed in the rack.

The rack must allow enough ventilation space between the DSN-2100 storage system and
any other objects in the vicinity. Do not block the air vents on the front and back of the
DSN-2100 enclosure. The air flow clearances specified in this guide must be maintained
within the rack.

The AC supply circuit for rack-mounted equipment must be capable of supplying the
total current specified on all the labels of the rack-mounted equipment.

All AC power supply connections must be properly grounded. To ensure the integrity of
the earth connection, special attention must be given to connections that are not
directly connected to the branch circuit (for example, power strips).
Unpacking the DSN-2100 Storage System
After receiving the DSN-2100 storage system, perform the following steps to ensure that it
and other contents arrived safely.
1. Inspect the outer shipping container for any damage that may have occurred in shipping.
Report any sign of damage to the appropriate shipping agency.
2. Remove the DSN-2100 storage system and cables from the shipping container.
3. Save the shipping container, foam, and antistatic bags in case you have to return the
DSN-2100 storage system. Returning the DSN-2100 storage system in any other container
is not advised.
4. Check the contents against the items referenced on the packing list. If any item is
missing or damaged, notify a sales representative and/or the shipping agency.
DSN-2100 Hardware Reference Guide
19
3.3
Items Supplied by the User
Table 3-1 lists the additional items you must supply to perform the DSN-2100 storage system
installation. All users must provide the items in the first row of Table 3-1. Thereafter, the
additional items required for installation depend on the user category into which you fit.
Table 3-1. User-Supplied Items to Perform the DSN-2100 Storage System Installation
User Category
All Users
Rack-Mount Users
User-Supplied Items

A PC with a Network Interface Card (NIC) that will act as the iSCSI initiator. (See Note 1.)

A PC with a NIC and Internet access that will access the management console. (See Note 1.)

One or more available AC outlets not controlled by a wall switch.

Optional: An Ethernet switch and Ethernet cable. If you want to use the DSN-2100 storage
system’s Link Aggregation feature, the switch must support LAGs.

An IP address for each DSN-2100 storage system host connection RJ-45 data port that will
connect to your SAN.

An Ethernet cable for each DSN-2100 storage system host connection RJ-45 data port that will
connect to your SAN (the DSN-2100 storage system auto-senses the cable type used).

A standard NEMA-compliant 19-inch rack.

Additional Mounting hardware for specific rack being used.
Note 1: For convenience, one PC with three installed NICs can be used instead of separate PCs. In this configuration, one NIC
connects to the DSN-2100 storage system management port, a second NIC connects to the Internet, and a third NIC is used
with the iSCSI initiator.
20
Chapter 3 Installing the DSN-2100 Storage System
3.4
Connecting to the iSCSI Data Ports
The following sections describe how to connect the DSN-2100 data ports.
3.4.1
Connecting to the DSN-2100 Host Network Connection Ports
The DSN-2100 storage system has four RJ-45 data ports. These ports connect to your SAN
using either a straight-through or cross-over RJ-45 Ethernet cable (the DSN-2100 storage
system auto-senses the type of cable used). One cable is needed for each RJ-45 data port.
1. Attach one end of an Ethernet cable to host network connection port 0 on the DSN-2100
storage system back panel. Connect the other end of the cable to your SAN or host
system.
2. To connect additional host network connection ports to your SAN, repeat step 1 using
another Ethernet cable and the next available DSN-2100 storage system port in sequence
(port 1, then port 2, and so on). Do not skip ports when making these connections.
3.5
Connecting to the Management Port
Connecting a PC to the management port lets you configure and manage the DSN-2100
storage system. This connection is made using a PC with an installed NIC and either a crossover cable (if connecting directly to the management port) or a straight-through cable (if
connecting to the management port using a hub or switch).
To receive email alerts from the DSN-2100 storage system, be sure the management port can
communicate via Ethernet with your mail server.
1. Connect either end of an Ethernet cable to a NIC installed in a PC.
2. Connect the other end of the cable into the DSN-2100 storage system Mgmt 10/100 port.
This port is located to the right of the diagnostic port on the back panel (see Figure 2-3).
Do not connect one NIC to the management and host network connection
ports. Connect one NIC to the management port and connect another NIC in
the same PC or a different PC to the host network connection port(s).
DSN-2100 Hardware Reference Guide
21
3.6
Connecting the Power Cords
The DSN-2100 storage system has a two power receptacles. Both must be used to connect
the DSN-2100 to an AC outlet:
1. Plug the female end of the power cord into the 3-pronged power connectors on the back
of the DSN-2100 storage system. Plug the other end of the power cord into a working AC
outlet that is not controlled by a wall switch.
2. Repeat the previous step using the second power cable and power receptacle on the
DSN-2100 storage system. For best results, all both power receptacles should be on a
different circuit.
Although the DSN-2100 storage system can operate temporarily with only
two AC power connections, an audio alarm will sound until both power
receptacles are used.
3.7
Powering-on the DSN-2100 Storage System
To power-on the DSN-2100 storage system, press the power switch on the back panel. When
the DSN-2100 storage system powers-on, the following actions occur:

The DSN-2100 storage system Power LED turns green (see Figure 2-1).

The DSN-2100 storage system runs its power-on procedure (~4 minutes), then the
Ready/Fault LED turns green and drive LEDs may flash.
The completion of the power-on process can be verified as indicated in Table 3-2.
Table 3-2. Verifying Completion of the DSN-2100 Storage System Power-on Process
If the DSN-2100 Storage System…
Verify the Power-on Process by…
Has no front panel Ready/Fault LED
Wait five minutes after powering-on the DSN-2100 storage
system.
Has a front panel Ready/Fault LED.
The LED turns green when the startup process completes. If
the LED turns red, reboot the DSN-2100 storage system. If the
problem persists, contact Technical Support.
Diagnostic port is connected to a PC via a diagnostic cable.
The message RCP sequence complete appears on the PC
monitor. After verifying this message, disconnect the PC from
the diagnostic port.
After the DSN-2100 storage system powers-on for the first time, it automatically loads the
factory-default configuration settings. If necessary, you can use the xStack Storage
Management Center to change these settings to suit your requirements. For a description of
the array’s factory-default configuration settings and how to change them, refer to the
xStack Storage Management Center User's Guide.
22
Chapter 3 Installing the DSN-2100 Storage System
Appendix A Replacing and Upgrading FRUs
This appendix describes how to replace or upgrade the Field Replaceable Units (FRUs) in your
xStack Storage Array. FRUs that can be replaced or upgraded include:
A.1

Battery Pack

System and buffer memory

SATA drives

Fans

Power supplies
Installing the Battery Pack
The xStack Storage Array accommodates a 4-cell or 6-cell shrink-wrapped battery pack.
Because write-back caching is always enabled, we recommend you have a battery to back up
the buffer cache contents.
To install a battery in your xStack Storage SAN Array, follow these steps:
1. Hold the battery as shown to align the fastener pad. Make sure the battery cable and
connector is located nearest to the battery socket J35 on the controller (see Figure A-1 ).
Figure A-1 Aligning the Battery
DSN-2100 Hardware Reference Guide
23
2. Press the battery down firmly as shown in Figure A-2 until you feel it lock into place.
Figure A-2 Press the Battery Down Firmly Until it Locks
3. Align the battery plug with connector J35 as shown in Figure A-3 and insert it fully into the
socket.
Figure A-3 Align the Battery Plug with Connector J35
24
Appendix A Replacing and Upgrading FRUs
4. The connector locked firmly into connector J35.
Figure A-4 Battery Plug Locked in Place
5. The installed battery is shown in Figure A-5.
Figure A-5 The Installed Battery
DSN-2100 Hardware Reference Guide
25
A.2
Installing Memory
The xStack Storage Array provides four memory sockets:

Two sockets (J36 and J37) are for buffer/cache memory

Two sockets (J38 and J39) are for system memory
System Memory: The xStack Storage controller can address up to 2GB of system memory, but
only 512MB are required for operation of your controller. Your controller will have come
standard with at least 512MB (2 x 256MB modules) making upgrading of system memory not
necessary. Please see Figure A-6 system memory location.
Buffer (Cache) Memory: The xStack Storage controller can address up to 2GB of buffer
memory, and comes standard with at least 512MB (2 x 256MB modules) installed. This should
work well for most applications. However, several applications (such as video streaming) of
the product could benefit from increased cache memory. Please see Figure A-6 for buffer
memory location.Note on Memory: The xStack Storage controller’s system and buffer memory
must be installed as matching pairs. Table A-1 lists the specifications for DIMMs supported by
the xStack Storage Array. These memory module specifications are crucial to the operation of
your SAN array. Please visit the www.dlink.com website for tested memory modules.
Table A-2 shows the possible memory configurations for your xStack Storage controller.
Please note that you must use matching memory modules for DIMM0 & DIMM1 as well as
matching memory modules for DIMM2 & DIMM3.
Figure A-6 Buffer and System Memory Location
26
Appendix A Replacing and Upgrading FRUs
Table A-1. xStack Storage Array DIMM Specifications
Requirement
Description
PC2700/DDR333 speed
SDRAMs must be JEDEC compliant and DDR333 capable, with a CAS latency of 2.5.
PC2100/DDR400 speed DIMMs can be used if they support a 2.5 CAS latency when
operating at DDR333 speed.
ECC
DIMMs must be organized as x72 bits wide, allowing support for ECC.
X8 RAMs
DIMMs must use 8-bit wide DRAMs that can support data mask (DM) signals. DIMMs that
use 4-bit-wide DRAMs do not provide DM signals and cannot be used.
Registered
DIMMs must be registered as per the JEDEC specification for registered DIMMs.
Buffered
DIMMs must be buffered as per the JEDEC specification for buffered DIMMs.
Organization
Conforming DIMM organizations are shown in Table A-2..
Table A-2. DIMM Organization
DIMM 0 (J38)
DIMM 1 (J39)
Total
DIMM 2 (J36)
DIMM 3 (J37)
Total
System
Memory
Module
System
Memory
Module
System
Memory
Buffer/Cache
Memory
Module
Buffer/Cache
Memory
Module
Buffer/Cache
Memory
256MB
256MB
512MB
256MB
256MB
512MB
1GB
256MB
256MB
512MB
512MB
512MB
1GB
1.5GB
256MB
256MB
512MB
1GB
1GB
2GB
2.5GB
256MB
256MB
512MB
2GB
2GB
4GB
4.5GB
DSN-2100 Hardware Reference Guide
Total
Memory
27
A.3
Installing or Replacing SATA Drives
Removal of a populated drive/tray assembly can have unforeseen effects
including the loss of all data in a volume. A drive can be part of a volume
that may or may not be redundant. Before removing a drive from an
operating xStack Storage Array, make sure it is the correct one.
A.3.1 Drive and Tray Removal
A drive/tray assembly can be removed by pressing upwards on the green latch found on the
tray and removing it with the handle as shown in Figure A-7 and Figure A-8.
Figure A-7 Drive and Tray Removal
Figure A-8 Remove Drive/Tray
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Appendix A Replacing and Upgrading FRUs
A.3.2 Installing a Hard Drive in a Drive Tray
Follow these steps to install a hard drive in a drive tray.
1. Remove the plastic air dam from the tray by squeezing the two levers together and
lifting the piece out of the tray as shown in Figure A-9.
Figure A-9 Removing the Plastic Air Dam Piece
2. Your tray should now look like Figure A-10.
Figure A-10 Tray with Air Dam Removed
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3. Place new hard drive in tray as shown in Figure A-11.
Figure A-11 Place Hard Drive in Tray
4. Align the mounting holes and insert four mounting screws to hold the drive securely in
the drive tray as shown in Figure A-12.
Figure A-12 Secure the Hard Drive in the Drive Tray
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Appendix A Replacing and Upgrading FRUs
5. Your hard drive is ready for installation. Proceed to A.3.3.
A.3.3 Drive and Tray Installation
A drive/tray assembly can be installed by inserting the drive/tray assembly into the open
drive bay as shown in Figure A-13. Push the tray at the point indicated in Step 2 of Figure
A-14 and push until it is seated firmly within the bay. As you press, you will see the tray
handle begin to move inwards as the locking mechanism enters the locking slot. When you
see this, then you must push the tray handle inwards as shown in Figure A-15 until you hear
the green locking mechanism click.
Figure A-13 Drive/Tray Installation
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Figure A-14 Press Here Until You See the Lever Move Inwards
Figure A-15 Press Lever Inwards Until it Locks
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Appendix A Replacing and Upgrading FRUs
A.4
Replacing a Fan
The xStack Storage Array contains three user replaceable fans. They can be replaced as
follows.
1. Locate the failed fan. They can be identified by their green handle as seen in Figure A16.
Figure A-16 A User Replaceable Fan with Green Handle
2. Lift the handle, grasp it and pull the fan upwards as seen in Figure A-17.
Figure A-17 Lift the Handle and Pull Upwards
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3. Remove the fan from its socket as seen in Figure A-18.
Figure A-18 Remove the Fan
4. Insert the new fan by reversing the previous steps. i.e. Insert fan into socket, press
firmly downwards until it is seated and lower the handle to lock it in place.
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Appendix A Replacing and Upgrading FRUs
A.5
Replacing a Power Supply
The xStack Storage Array contains three user replaceable power supply modules. They can
be replaced as follows.
1. Locate the failed power supply module. Unscrew the bolt holding the locking
mechanism in place as shown in Figure A-19.
Figure A-19 Unscrew the Bolt Holding the Locking Mechanism
2. Push the locking lever to the left and pull on the handle as shown in Figure A-20.
Figure A-20 Push the Locking Lever to the Left and Pull Handle
3. Remove the power supply module as shown in Figure A-21.
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Figure A-21 Remove the Power Supply Module
4. Insert the new power supply module by reversing the previous steps. i.e. Insert the
new power supply module into the bay until it seats against the rear and the lever
locks. Then screw the locking bolt into place.
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Appendix A Replacing and Upgrading FRUs