®
ServeRAID M5025 SAS/SATA Controller for IBM
System x
IBM System x at-a-glance guide
The ServeRAID M5025 SAS/SATA Controller for IBM System x is the next-generation 6 Gbps SAS 2.0
external RAID controller. This adapter has two external mini-SAS connectors to control up to 240 devices
and supports global and dedicated hot-spare drives. The ServeRAID M5025 controller delivers a full
6-Gbps SAS 2.0 RAID solution with the performance advantages of an extended cache and a standard
battery backup unit. With the attachment of the ServeRAID M5000 Advanced Feature Key, the
ServeRAID M5025 offers the option of RAID 6, RAID 60 and SED Encryption Key Management.
Figure 1 shows the ServeRAID M5025 with its standard battery backup unit.
Figure 1. ServeRAID M5025 SAS/SATA Controller
Did you know
6 Gbps SAS 2.0 technology has been introduced to address data off-load bottlenecks in the direct-access
storage environment. This new throughput doubles the transfer rate of the previous generation. SAS 2.0
is designed for backward compatibility with 3 Gbps SAS as well as with 3 Gbps SATA hard drives.
ServeRAID M5025 SAS/SATA Controller for IBM System x
1
Part number information
Table 1. Ordering part numbers and feature codes
Description
Part number
Feature code
ServeRAID M5025 SAS/SATA Controller
46M0830
0094
ServeRAID M5000 Series Advanced Feature Key
46M0930
5106
IBM 3m SAS Cable
39R6531
3707
IBM 1m SAS Cable
39R6529
3708
The ServeRAID M5025 includes the following items:






One ServeRAID M5025 adapter card with full-height (3U) bracket
Low-profile (2U) bracket
ServeRAID M5000 battery (attached)
Battery Remote Mount Cable
Documentation CD
The IBM Important Notices Document
Specifications
The ServeRAID M5025 adapter card has the following specifications:

Eight external 6 Gbps SAS 2.0 ports implemented via two four-lane (x4) connectors

Two mini-SAS external connectors (SFF-8088)

6 Gbps throughput per SAS port

800 MHz PowerPC processor with LSI SAS2108 6 Gbps RAID on Chip (ROC) controller

PCI Express 2.0 x8 host interface

512 MB onboard data cache (DDR2 running at 800 MHz)

Intelligent lithium polymer battery backup unit standard with up to 48 hours of data retention

Supports RAID levels 0, 1, 5, 10, and 50 (RAID 6 and 60 support with the optional M5000 Advanced
Feature Key)

Connects to


Up to 240 SAS or SATA drives
Up to 9 daisy-chained enclosures per port

SAS and SATA drives are supported, but the mixing of SAS and SATA in the same RAID array is not
supported

Supports up to 64 logical volumes

Supports LUN sizes up to 64 TB

Configurable stripe size up to 1 MB

Compliant with Disk Data Format (DDF) configuration on disk (COD)

S.M.A.R.T. support
The key difference between the ServeRAID M5025 and M5015 RAID controllers is that the M5025 has
two external SAS 2.0 x4 connectors and the M5015 has two internal SAS 2.0 x4 connectors.
ServeRAID M5025 SAS/SATA Controller for IBM System x
2
Features
The ServeRAID M5025 adapter card has the following features:

Auto-resume on array rebuild or array reconstruction after loss of system power
Auto-resume uses non-volatile NVRAM to save rebuild progress during a host reboot or power failure
to automatically resume from the last checkpoint. Auto-resume will ensure data integrity is maintained
through the process. The card supports a number of features that can be implemented without
rebooting the server. Applications such as email and web server benefit from avoiding downtime
during transition.

Online Capacity Expansion
Online Capacity Expansion (OCE) allows the capacity of a virtual disk to be expanded by adding new
physical disks or making use of unused space on existing disks, without requiring a reboot.

Online RAID Level Migration
Online RAID Level Migration (also known as logical drive migration) provides the ability to migrate a
virtual disk from any RAID level to any other RAID level without requiring a reboot. System availability
and application functionality remain unaffected.

Fast initialization for quick array setup

Consistency check for background data integrity
Consistency Check verifies that all stripes in a virtual disk with a redundant RAID level are consistent.
For RAID 1, the consistency check will mirror data when an inconsistent stripe is detected. For RAID
5 or RAID 6, the consistency check will recreate the parity from the peer disks. Consistency checks
can be scheduled to take place periodically.

Extensive online configuration options: advanced monitoring and event notification
Management tools provide convenience for configuration of logical volumes and alerts when errors
have occurred or are about to occur.

Patrol Read for media scanning and repairing
Patrol read is a background sentry service designed to proactively discover and correct media defects
(bad sectors) that arise normally as a disk drive ages. The service issues a series of verify commands
and if a bad block is discovered, the card's firmware will use RAID algorithms to recreate the missing
data and remap the sector to a good sector. The task is interruptible based on controller activity and
host operations. The firmware also provides an interface where the patrol read task can be initiated,
set up for continuous operation, and terminated from a management application. Patrol read can be
activated by manual command or automatically.

Global and dedicated Hot Spare with Revertible Hot Spare support:
A hot spare rebuilds data from all virtual disks within the disk group in which it is configured.
ServeRAID provides the ability to define a physical disk as a hot spare to replace a failed drive. Hot
spares can be configured as either global or dedicated. A global hot spare allows any physical drive to
be designated as a hot spare. A dedicated hot spare will allow the user to assign a hot spare drive to
a particular array of the same drive type.
ServeRAID M5025 SAS/SATA Controller for IBM System x
3
The ServeRAID M5000 Series Advanced Feature Key enables the following features:

RAID levels 6 and 60

LSI SafeStore: support for self-encrypting drive services:


Instant secure erase
Local key management
LSI SafeStore encryption services offer instant secure erase and local key management for
self-encrypting drives. This technology represents a significant step forward in securing data on a disk
drive from any unauthorized access or modification resulting from theft, loss, or repurposing of drives:

Instant secure erase permanently removes data when repurposing or decommissioning SEDs.

SafeStore local key management provides the necessary management and protection of SEDs using
a simple pass phrase, security key identifier, and security key file that can be set and applied to all
SEDs assigned to a ServeRAID adapter. This removes the complexity of managing each SED’s
unique encryption key, and essentially relieves the administrator from most of the daily tasks of
securing data.
Note: To use the SED services of the ServeRAID M5000 Series Advanced Feature Key, you must use
self-encrypting drives as listed in "Supported disk drives" below.
Self-encrypting drives are based on a new technology that helps prevent data from being accessed
without authorization. These drives adhere to the Trusted Computing Group (TCG) Enterprise Security
Subsystem Class specification and are National Security Agency qualified to provide government-grade
encryption. With self-encrypting drives (SEDs), if a drive is removed from its storage system or the server
that it is housed in, the data on that drive is encrypted and useless to anyone who attempts to access it
without the appropriate security authorization.
Figure 2 shows the ServeRAID M5000 Series Advanced Feature Key.
ServeRAID M5025 SAS/SATA Controller for IBM System x
4
Figure 2. ServeRAID M5000 Series Advanced Feature Key
Operating environment
The ServeRAID M5025 adapter card is supported in the following environment:

Temperature:



At 0-1000 m (0-3000 ft): 10-35° C (50-95° F)
At 1000-2100 m (3000-7000 ft): 10-32° C (50-90° F)
Relative humidity: 20-80% (non-condensing)
Warranty
One-year limited warranty. When installed on a System x server, these cards assume your system’s base
warranty and any IBM ServicePac upgrade. Batteries are consumables and therefore are not covered
under the warranty.
ServeRAID M5025 SAS/SATA Controller for IBM System x
5
Supported servers
The ServeRAID M5025 adapter card is supported on the IBM System x servers listed in Table 2.
Table 2. Supported System x servers (Part 1)
Adapter
Part
number
ServeRAID M5025 Controller
46M0830
N
N
Y
N
Y
N
N
Y
Y
N
N
Y
Y
N
N
N
N
Y
Y
N
Y
N
N
N
N
Y
Table 2. Supported System x servers (Part 2)
Adapter
ServeRAID M5025 Controller
N
Y
Y
See the IBM ServerProven website for the latest information about the adapters supported by each
System x server type: http://ibm.com/servers/eserver/serverproven/compat/us/.
Supported external enclosures
The ServeRAID M5025 controller supports connectivity to the external SAS expansion enclosures listed
in Table 3.
Table 3. Supported expansion enclosures
Expansion Enclosure
Part number
Supported with
ServeRAID M5025
Maximum number
of enclosures*
IBM System Storage EXP3000
172701X / 39R6464
Yes
18
IBM System Storage EXP3512 Express
1746A2E
No
None
IBM System Storage EXP3524 Express
1746A4E
No
None
IBM System Storage EXP2512 Express
174712X
Yes
18
IBM System Storage EXP2524 Express
174724X
Yes
9
* This refers the maximum number of enclosures supported connected to one ServeRAID M5025
ServeRAID M5025 SAS/SATA Controller for IBM System x
6
Supported operating systems
The ServeRAID M5025 adapter card supports the following operating systems:




































Microsoft Windows Server 2003, Web Edition
Microsoft Windows Server 2003/2003 R2, Datacenter Edition
Microsoft Windows Server 2003/2003 R2, Datacenter x64 Edition
Microsoft Windows Server 2003/2003 R2, Enterprise Edition
Microsoft Windows Server 2003/2003 R2, Enterprise x64 Edition
Microsoft Windows Server 2003/2003 R2, Standard Edition
Microsoft Windows Server 2003/2003 R2, Standard x64 Edition
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2008, Datacenter x64 Edition
Microsoft Windows Server 2008, Datacenter x86 Edition
Microsoft Windows Server 2008, Enterprise x64 Edition
Microsoft Windows Server 2008, Enterprise x86 Edition
Microsoft Windows Server 2008, Standard x64 Edition
Microsoft Windows Server 2008, Standard x86 Edition
Microsoft Windows Server 2008, Web x64 Edition
Microsoft Windows Server 2008, Web x86 Edition
Microsoft Windows Small Business Server 2003/2003 R2 Premium Edition
Microsoft Windows Small Business Server 2003/2003 R2 Standard Edition
Red Hat Enterprise Linux 4 AS for AMD64/EM64T
Red Hat Enterprise Linux 4 AS for x86
Red Hat Enterprise Linux 4 ES for AMD64/EM64T
Red Hat Enterprise Linux 4 ES for x86
Red Hat Enterprise Linux 4 WS/HPC for AMD64/EM64T
Red Hat Enterprise Linux 4 WS/HPC for x86
Red Hat Enterprise Linux 5 Server Edition
Red Hat Enterprise Linux 5 Server Edition with Xen
Red Hat Enterprise Linux 5 Server with Xen x64 Edition
Red Hat Enterprise Linux 5 Server x64 Edition
SUSE LINUX Enterprise Server 10 for AMD64/EM64T
SUSE LINUX Enterprise Server 10 for x86
SUSE LINUX Enterprise Server 10 with Xen for AMD64/EM64T
SUSE LINUX Enterprise Server 11 for AMD64/EM64T
SUSE LINUX Enterprise Server 11 for x86
SUSE LINUX Enterprise Server 11 with Xen for AMD64/EM64T
VMware ESX 4.0
VMware ESXi 4.0
See the IBM ServerProven website for the latest information about the specific versions and service
packs supported: http://ibm.com/servers/eserver/serverproven/compat/us/. Click System x servers , then
Disk controllers to see the support matrix. Click the check mark that is associated with the System x
server in question to see the details of the operating system support.
ServeRAID M5025 SAS/SATA Controller for IBM System x
7
Related publications
For more information refer to the following documents:

IBM US Announcement Letter
http://ibm.com/common/ssi/cgi-bin/ssialias?infotype=dd&subtype=ca&&htmlfid=897/ENUS110-172

IBM US Announcement Letter for the M5000 Series Advanced Feature Key:
http://ibm.com/common/ssi/cgi-bin/ssialias?infotype=dd&subtype=ca&&htmlfid=897/ENUS109-739

ServeRAID M5025 Quick Install Guide
http://ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5086113

ServeRAID M5025 Installation and User's Guide
http://ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5086123

System x RAID products home page:
http://www.ibm.com/systems/storage/product/systemx/scsi_raid.html

IBM ServeRAID software matrix:
http://www.ibm.com/support/docview.wss?uid=psg1SERV-RAID

IBM System x Configuration and Options Guide:
http://www.ibm.com/support/docview.wss?uid=psg1SCOD-3ZVQ5W
ServeRAID M5025 SAS/SATA Controller for IBM System x
8
Notices
This information was developed for products and services offered in the U.S.A.
IBM may not offer the products, services, or features discussed in this document in other countries. Consult your local
IBM representative for information on the products and services currently available in your area. Any reference to an
IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may
be used. Any functionally equivalent product, program, or service that does not infringe any IBM intellectual property
right may be used instead. However, it is the user's responsibility to evaluate and verify the operation of any non-IBM
product, program, or service. IBM may have patents or pending patent applications covering subject matter described
in this document. The furnishing of this document does not give you any license to these patents. You can send
license inquiries, in writing, to:
IBM Director of Licensing, IBM Corporation, North Castle Drive, Armonk, NY 10504-1785 U.S.A.
The following paragraph does not apply to the United Kingdom or any other country where such provisions
are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS
PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain
transactions, therefore, this statement may not apply to you. This information could include technical inaccuracies or
typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in
new editions of the publication. IBM may make improvements and/or changes in the product(s) and/or the program(s)
described in this publication at any time without notice.
Any references in this information to non-IBM Web sites are provided for convenience only and do not in any manner
serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this
IBM product and use of those Web sites is at your own risk.IBM may use or distribute any of the information you
supply in any way it believes appropriate without incurring any obligation to you. Information concerning non-IBM
products was obtained from the suppliers of those products, their published announcements or other publicly
available sources. IBM has not tested those products and cannot confirm the accuracy of performance, compatibility
or any other claims related to non-IBM products. Questions on the capabilities of non-IBM products should be
addressed to the suppliers of those products. This information contains examples of data and reports used in daily
business operations. To illustrate them as completely as possible, the examples include the names of individuals,
companies, brands, and products. All of these names are fictitious and any similarity to the names and addresses
used by an actual business enterprise is entirely coincidental.
Any performance data contained herein was determined in a controlled environment. Therefore, the results obtained
in other operating environments may vary significantly. Some measurements may have been made on
development-level systems and there is no guarantee that these measurements will be the same on generally
available systems. Furthermore, some measurement may have been estimated through extrapolation. Actual results
may vary. Users of this document should verify the applicable data for their specific environment.
COPYRIGHT LICENSE:
This information contains sample application programs in source language, which illustrate programming techniques
on various operating platforms. You may copy, modify, and distribute these sample programs in any form without
payment to IBM, for the purposes of developing, using, marketing or distributing application programs conforming to
the application programming interface for the operating platform for which the sample programs are written. These
examples have not been thoroughly tested under all conditions. IBM, therefore, cannot guarantee or imply reliability,
serviceability, or function of these programs.
© Copyright International Business Machines Corporation 2010. All rights reserved.
Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by
GSA ADP Schedule Contract with IBM Corp.
ServeRAID M5025 SAS/SATA Controller for IBM System x
9
This document was created or updated on November 30, 2010.
Send us your comments in one of the following ways:
Use the online Contact us review form found at:
ibm.com/redbooks

Send your comments in an e-mail to:
redbook@us.ibm.com

Mail your comments to:
IBM Corporation, International Technical Support Organization
Dept. HYTD Mail Station P099
2455 South Road
Poughkeepsie, NY 12601-5400 U.S.A.

This document is available online at http://www.ibm.com/redbooks/abstracts/tips0739.html .
Trademarks
IBM, the IBM logo, and ibm.com are trademarks or registered trademarks of International Business
Machines Corporation in the United States, other countries, or both. These and other IBM trademarked
terms are US registered or common law trademarks owned by IBM at the time this information was
published. Such trademarks may also be registered or common law trademarks in other countries. A
current list of IBM trademarks is available on the Web at http://www.ibm.com/legal/copytrade.shtml
The following terms are trademarks of the International Business Machines Corporation in the United
States, other countries, or both:
IBM®
PowerPC®
Redpaper™
Redbooks (logo)®
ServerProven®
ServicePac®
System x®
The following terms are trademarks of other companies:
Microsoft, Windows, and the Windows logo are trademarks of Microsoft Corporation in the United States,
other countries, or both.
Linux is a trademark of Linus Torvalds in the United States, other countries, or both.
Other company, product, or service names may be trademarks or service marks of others.
ServeRAID M5025 SAS/SATA Controller for IBM System x
10