IBM System x3400 Type 7975 User manual

System x3400
Ty pes 7973, 7974, 7975, and 7976
User’s Guide


System x3400
Ty pes 7973, 7974, 7975, and 7976
User’s Guide


Note:
Before using this information and the product it supports, read the general information in “Notices,” on page 105, and the Warranty
and Support Information document on the IBM System x3400 Documentation CD.
Fifth Edition (October 2008)
©Copyright International Business Machines Corporation 2008.
US Government Users Restricted Rights –Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Safety ............................v
Chapter 1. The System x3400 server ................1
Related documentation ......................1
Notices and statements in this document ................2
Machine Types 7973 and 7974 features and specifications .........3
Machine Types 7975 and 7976 features and specifications .........4
What your server offers ......................6
Reliability, availability, and serviceability ................7
IBM Director ..........................8
Server controls, LEDs, and power ..................10
Front view .........................10
Rear view ..........................13
Server power features .....................15
Chapter 2. Installing options ...................17
Server components .......................17
System-board internal connectors .................18
System-board switches .....................19
System-board external connectors .................20
System-board option connectors .................21
System-board LEDs ......................22
Installation guidelines ......................22
System reliability guidelines ...................23
Working inside the server with the power on .............23
Handling static-sensitive devices .................24
Removing the bezel .......................25
Removing the side cover .....................26
Removing the front fan cage assembly ................27
Installing amemory module ....................28
Installing adrive ........................34
Installing aCD or DVD drive ...................36
Installing atape drive .....................39
Installing ahot-swap hard disk drive ................41
IDs for hot-swap hard disk drives .................42
Installing asimple-swap SATA hard disk drive ............43
Power and signal cables for internal drives .............44
Installing an adapter .......................46
Installing amicroprocessor ....................48
Installing ahot-swap power supply .................52
Installing ahot-swap fan .....................55
Installing the ServeRAID 8k-l adapter ................56
Installing the ServeRAID-8k adapter .................57
Installing the optional IBM ServeRAID-MR10is VAULT SAS/SATA Controller 60
Installing an IBM Remote Supervisor Adapter II SlimLine .........65
Completing the installation.....................68
Replacing the bezel ......................68
Replacing the side cover ....................70
Connecting the cables .....................71
Updating the server configuration .................72
Connecting external devices ....................72
Installing the server in arack....................73
©Copyright IBM Corp. 2008 iii

Chapter 3. Configuring the server .................75
Using the Configuration/Setup Utility program .............76
Starting the Configuration/Setup Utility program ............76
Configuration/Setup Utility menu choices ..............76
Passwords .........................80
Using the ServerGuide Setup and Installation CD ............81
ServerGuide features .....................81
Setup and configuration overview .................82
Typical operating system installation ................82
Installing your operating system without ServerGuide ..........82
Using the Boot Menu program ...................83
Enabling the Broadcom Gigabit Ethernet Utility program..........83
Configuring the Broadcom Gigabit Ethernet controller...........83
Updating IBM Director ......................84
Using the RAID configuration programs ................84
Configuring hot-swap SAS, hot-swap SATA, or Simple-swap SATA (some
models) RAID .......................85
Configuring simple-swap SATA RAID ................87
Using ServeRAID Manager ...................88
Remote Supervisor Adapter II SlimLine ................90
Requirements ........................90
Cabling the Remote Supervisor Adapter II SlimLine ..........91
Installing the Remote Supervisor Adapter II SlimLine firmware ......91
Completing the setup .....................92
Using the baseboard management controller ..............92
Enabling and configuring SOL using the OSA SMBridge management utility
program .........................92
Installing the OSA SMBridge management utility program........ 101
Using the baseboard management controller utility programs ...... 103
Appendix. Notices ....................... 105
Trademarks.......................... 105
Important notes ........................ 106
Product recycling and disposal .................. 107
Battery return program ..................... 108
Electronic emission notices .................... 109
Federal Communications Commission (FCC) statement ........ 109
Industry Canada Class Aemission compliance statement ........110
Avis de conformité àla réglementation d’Industrie Canada .......110
Australia and New Zealand Class Astatement ............110
United Kingdom telecommunications safety requirement ........110
European Union EMC Directive conformance statement ........110
Taiwanese Class Awarning statement ............... 111
Chinese Class Awarning statement ................ 111
Japanese Voluntary Control Council for Interference (VCCI) statement ... 111
Korean Class Awarning statement ................ 111
Index ............................113
iv System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

Safety
Before installing this product, read the Safety Information.
Antes de instalar este produto, leia as Informações de Segurança.
Pred instalací tohoto produktu si prectete prírucku bezpecnostních instrukcí.
Læs sikkerhedsforskrifterne, før du installerer dette produkt.
Lees voordat udit product installeert eerst de veiligheidsvoorschriften.
Ennen kuin asennat tämän tuotteen, lue turvaohjeet kohdasta Safety Information.
Avant d’installer ce produit, lisez les consignes de sécurité.
Vor der Installation dieses Produkts die Sicherheitshinweise lesen.
Prima di installare questo prodotto, leggere le Informazioni sulla Sicurezza.
Les sikkerhetsinformasjonen (Safety Information) før du installerer dette produktet.
Antes de instalar este produto, leia as Informações sobre Segurança.
Antes de instalar este producto, lea la información de seguridad.
Läs säkerhetsinformationen innan du installerar den här produkten.
©Copyright IBM Corp. 2008 v

Important:
All caution and danger statements in this documentation begin with anumber. This
number is used to cross reference an English caution or danger statement with
translated versions of the caution or danger statement in the IBM Safety Information
book.
For example, if acaution statement begins with anumber 1, translations for that
caution statement appear in the IBM Safety Information book under statement 1.
Be sure to read all caution and danger statements in this documentation before
performing the instructions. Read any additional safety information that comes with
the blade server or optional device before you install the device.
Statement 1:
vi System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

DANGER
Electrical current from power, telephone, and communication cables is
hazardous.
To avoid ashock hazard:
vDo not connect or disconnect any cables or perform installation,
maintenance, or reconfiguration of this product during an electrical
storm.
vConnect all power cords to aproperly wired and grounded electrical
outlet.
vConnect to properly wired outlets any equipment that will be attached to
this product.
vWhen possible, use one hand only to connect or disconnect signal
cables.
vNever turn on any equipment when there is evidence of fire, water, or
structural damage.
vDisconnect the attached power cords, telecommunications systems,
networks, and modems before you open the device covers, unless
instructed otherwise in the installation and configuration procedures.
vConnect and disconnect cables as described in the following table when
installing, moving, or opening covers on this product or attached
devices.
To Connect: To Disconnect:
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlet.
5. Turn device ON.
1. Turn everything OFF.
2. First, remove power cords from outlet.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
Safety vii

Statement 2:
CAUTION:
When replacing the lithium battery, use only IBM Part Number 33F8354 or an
equivalent type battery recommended by the manufacturer. If your system has
amodule containing alithium battery, replace it only with the same module
type made by the same manufacturer. The battery contains lithium and can
explode if not properly used, handled, or disposed of.
Do not:
vThrow or immerse into water
vHeat to more than 100°C (212°F)
vRepair or disassemble
Dispose of the battery as required by local ordinances or regulations.
viii System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
vDo not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
vUse of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Appareil A Laser de Classe 1
`
Safety ix

Statement 4:
≥18 kg (39.7 lb) ≥32 kg (70.5 lb) ≥55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
1
2
xSystem x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

Statement 8:
CAUTION:
Never remove the cover on apower supply or any part that has the following
label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect aproblem with one of these parts, contact
aservice technician.
Statement 11:
CAUTION:
The following label indicates sharp edges, corners, or joints nearby.
Statement 12:
CAUTION:
The following label indicates ahot surface nearby.
Safety xi

Statement 13:
DANGER
Overloading abranch circuit is potentially afire hazard and ashock hazard
under certain conditions. To avoid these hazards, ensure that your system
electrical requirements do not exceed branch circuit protection
requirements. Refer to the information that is provided with your device for
electrical specifications.
Statement 15:
CAUTION:
Make sure that the rack is secured properly to avoid tipping when the server
unit is extended.
Statement 17:
CAUTION:
The following label indicates moving parts nearby.
WARNING: Handling the cord on this product or cords associated with accessories
sold with this product, will expose you to lead, achemical known to the State of
California to cause cancer, and birth defects or other reproductive harm. Wash
hands after handling.
ADVERTENCIA: El contacto con el cable de este producto ocon cables de
accesorios que se venden junto con este producto, pueden exponerle al plomo, un
elemento químico que en el estado de California de los Estados Unidos está
considerado como un causante de cancer yde defectos congénitos, además de
otros riesgos reproductivos. Lávese las manos después de usar el producto.
This product is suitable for use on an IT power distribution system whose maximum
phase to phase voltage is 240 Vunder any distribution fault condition.
xii System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

Chapter 1. The System x3400 server
The IBM®System x3400 Types 7973, 7974, 7975, and 7976 is a5-U-high,
high-performance server that is based on IBM X-Architecture®technologies. It is
ideally suited for networking environments that require superior microprocessor
performance, improved systems management, and flexible memory and data
management.
The server comes with alimited warranty. For information about the terms of the
warranty and getting service and assistance, see the Warranty and Support
Information document.
The server contains IBM Enterprise X-Architecture technologies, which help
increase performance, reliability, and availability. For more information, see “What
your server offers” on page 6and “Reliability, availability, and serviceability” on page
7.
You can obtain up-to-date information about the server and other IBM server
products at http://www.ibm.com/eserver/xseries/.
Related documentation
This User’s Guide provides general information about the server, including how to
install supported options and how to configure the server. The following
documentation also comes with the server:
vInstallation Guide
This printed document contains instructions for setting up the server and basic
instructions for installing some options.
vWarranty and Support Information
This document is in Portable Document Format (PDF) on the IBM System x3400
Documentation CD. It contains information about the terms of the warranty and
getting service and assistance.
vSafety Information
This document is in PDF on the IBM System x3400 Documentation CD. It
contains translated caution and danger statements. Each caution and danger
statement that appears in the documentation has anumber that you can use to
locate the corresponding statement in your language in the Safety Information
document.
vProblem Determination and Service Guide
This document is in PDF on the IBM System x3400 Documentation CD. It
contains information to help you solve problems yourself, and it contains
information for service technicians.
Depending on the server model, additional documentation might be included on the
IBM System x3400 Documentation CD.
The xSeries and System x™Tools Center is an online information center that
contains information about tools for updating, managing, and deploying firmware,
device drivers, and operating systems. The xSeries Tools Center is at
http://publib.boulder.ibm.com/infocenter/toolsctr/v1r0/index.jsp.
1. Racks are measured in vertical increments of 4.45 cm (1.75 inches) each. Each increment is called a″U.″A1-U-high device is
1.75 inches tall.
©Copyright IBM Corp. 2008 1

The server might have features that are not described in the documentation that
comes with the server. The documentation might be updated occasionally to include
information about those features, or technical updates might be available to provide
additional information that is not included in the server documentation. These
updates are available from the IBM Web site. To check for updated documentation
and technical updates, complete the following steps.
Note: Changes are made periodically to the IBM Web site. The actual procedure
might vary slightly from what is described in this document.
1. Go to http://www.ibm.com/support/.
2. Under Search technical support,type System x3400,and click Search.
Notices and statements in this document
The caution and danger statements that appear in this document are also in the
multilingual Safety Information document, which is on the IBM System x3400
Documentation CD. Each statement is numbered for reference to the corresponding
statement in the Safety Information document.
The following notices and statements are used in this document:
vNote: These notices provide important tips, guidance, or advice.
vImportant: These notices provide information or advice that might help you avoid
inconvenient or problem situations.
vAttention: These notices indicate potential damage to programs, devices, or
data. An attention notice is placed just before the instruction or situation in which
damage could occur.
vCaution: These statements indicate situations that can be potentially hazardous
to you. Acaution statement is placed just before the description of apotentially
hazardous procedure step or situation.
vDanger: These statements indicate situations that can be potentially hazardous
to you. Adanger statement is placed just before the description of apotentially
lethal or extremely hazardous procedure step or situation.
2System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

Machine Types 7973 and 7974 features and specifications
The following information is ahigh-level summary of the features and specifications
for Machine Types 7973 and 7974. Depending on the server model, some features
might not be available, or some specifications might not apply. See Chapter 2,
“Installing options,” on page 17 for more detail information about the specifications
and features and the installation of the components.
Table 1. Features and specifications
Microprocessor:
vSupports up to two Intel®Pentium®
dual-core processors
v4MB shared Level-2 cache
v667, 1066, or 1333 MHz front-side
bus (FSB)
Note: Use the Configuration/Setup
Utility program to determine the type
and speed of the microprocessors.
Memory:
vMinimum: 1GB
vMaximum: 32 GB (16 GB in mirrored
mode)
vTypes: PC2-5300, ECC fully-buffered
with double-data-rate 2(DDR2)
SDRAM
vConnectors: eight dual inline memory
module (DIMM) connectors, two-way
interleaved
Drives (depending on the model):
vDiskette (optional): External USB
diskette drive
vHard disk drive: SATA
vOne of the following IDE drives:
–CD-ROM
–CD-RW (optional)
–DVD-ROM (optional)
–DVD-ROM/CD-RW (optional)
Drive bays (depending on the
model):
vThree half-high 5.25-in. bays (one
CD or DVD drive installed) or one
half-high CD or DVD drive and one
full-high tape drive
vFour 3.5-in. simple-swap bays
Expansion slots (depending on the
model):
vSix expansion slots
–Three PCI Express x8 slots (two
x8 links and one x4 link)
–One PCI 32-bit/33 MHz slot
–Two PCI-X 64-bit/133 MHz slots
Fans:
Three speed-controlled hot-swap fans
Power supply:
670 watt (90-240 Vac)
Size:
vHeight: 440 mm (17.3 in.)
vDepth: 747 mm (29.4 in.)
vWidth: 218 mm (8.6 in.)
vWeight: 20 kg (42 lb) to 34 kg (75 lb)
depending upon configuration
Integrated functions:
vBaseboard management controller
(BMC) or onboard service processor
vBroadcom 5721 10/100/1000 Ethernet
controller on the system board with
RJ-45 Ethernet port
vSix-port, Serial ATA controller
vIntegrated RAID capability (SATA
HostRAID)
vRemote Supervisor Adapter II SlimLine
vTwo serial ports
vOne parallel port
vFour Universal Serial Bus (USB) v2.0
ports (two on front and two on rear)
vKeyboard port
vMouse port
vATA-100 single-channel IDE controller
(bus mastering)
vATI ES1000 video controller
–Compatible with SVGA and VGA
–16 MB SDRAM video memory
Diagnostic LEDs:
vFans
vMemory
vPower supply
Acoustical noise emissions:
vSound power, idling: 5.6 bel
vSound power, operating: 6.0 bel
Environment:
vAir temperature:
–Server on: 10° to 35°C (50° to 95°F)
Altitude: 0to 914 m(2998.0 ft)
–Server off: -40° to 60°C (-40° to 140°F)
Altitude: 0to 2133 m(7000.0 ft)
v
Humidity (operating and storage): 8% to
80%
Heat output:
Approximate heat output in British thermal
units (Btu) per hour:
vMinimum configuration: 693 Btu per hour
(203 watts)
vMaximum configuration: 1631 Btu per hour
(478 watts)
Electrical input:
vSine-wave input (50 or 60 Hz) required
vInput voltage and frequency ranges
automatically selected
vInput voltage low range:
–Minimum: 100 Vac
–Maximum: 127 Vac
vInput voltage high range:
–Minimum: 200 Vac
–Maximum: 240 Vac
vInput kilovolt-amperes (kVA) approximately:
–Minimum: 0.21 kVA (all models)
–Maximum: 0.49 kVA
Notes:
1. Power consumption and heat output vary
depending on the number and type of
optional features installed and the
power-management optional features in
use.
2. These levels were measured in controlled
acoustical environments according to the
procedures specified by the American
National Standards Institute (ANSI) S12.10
and ISO 7779 and are reported in
accordance with ISO 9296. Actual
sound-pressure levels in agiven location
might exceed the average values stated
because of room reflections and other
nearby noise sources. The declared
sound-power levels indicate an upper limit,
below which alarge number of computers
will operate.
Chapter 1. The System x3400 server 3

Machine Types 7975 and 7976 features and specifications
The following information is asummary of the features and specifications for
Machine Types 7975 and 7976. Depending on the server model, some features
might not be available, or some specifications might not apply. See Chapter 2,
“Installing options,” on page 17 for more detail information about the specifications
and features and the installation of the components.
4System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide

Table 2. Features and specifications
Microprocessor:
vSupports up to two Intel®Xeon
dual-core processors or two Intel
quad-core processors.
Important: Do not mix dual-core and
quad-core processors in the same
system.
v4MB shared Level-2 cache
v667, 1066, or 1333 MHz front-side
bus (FSB)
Note: Use the Configuration/Setup
Utility program to determine the type
and speed of the microprocessors.
Memory:
vMinimum: 1GB
vMaximum: 32 GB (16 GB in mirrored
mode)
vTypes: PC2-5300, ECC fully-buffered
with double-data-rate 2(DDR2)
SDRAM
vConnectors: eight dual inline memory
module (DIMM) connectors, two-way
interleaved
Drives (depending on the model):
vDiskette (optional): External USB
diskette drive
vHard disk drive: SATA or SAS
vOne of the following IDE drives:
–CD-ROM
–CD-RW (optional)
–DVD-ROM (optional)
–DVD-ROM/CD-RW (optional)
Drive bays (depending on the
model):
vThree half-high 5.25-in. bays (one
CD or DVD drive installed) or one
half-high CD or DVD and one
full-high tape drive
vEight 3.5-in. hot-swap hard disk drive
bays
Note: You can install up to eight
hot-swap drives when you order the
4-drive backplane option kit.
Expansion slots (depending on the
model):
vSix expansion slots
–Three PCI Express x8 slots (two
x8 links and one x4 link)
–One PCI 32-bit/33 MHz slot
–Two PCI-X 64-bit/133 MHz slots
Fans: Three speed-controlled hot-swap
fans (standard)
Note: Six fans are required to provide
redundancy in hot-swap models; therefore,
you must install an additional redundant
power and cooling option kit (the option kit
comes with ahot-swap power supply and
three hot-swap fans) to upgrade to
redundant mode.
Power supply:
One of the following power supplies:
vOne nonredundant 670 watt (90-240 V
ac)
vOne 835 watt (90-240 Vac).
Note: Two 835-watt power supplies
provide redundancy in hot-swap
models; therefore, you must install an
additional redundant power and cooling
option kit (the option kit comes with an
835-watt hot-swap power supply and
three hot-swap fans) to upgrade to
redundant mode.
Size:
vHeight: 440 mm (17.3 in.)
vDepth: 747 mm (29.4 in.)
vWidth: 218 mm (8.6 in.)
vWeight: 20 kg (42 lb) to 34 kg (75 lb)
depending upon configuration
Integrated functions:
vBaseboard management controller
(BMC) or onboard service processor
vBroadcom 5721 10/100/1000 Ethernet
controller on the system board with
RJ-45 Ethernet port
vDual-channel (four ports per channel)
onboard SAS/SATA controller
vRemote Supervisor Adapter II SlimLine
vTwo serial ports
vOne parallel port
vFour Universal Serial Bus (USB) v2.0
ports (two on front and two on rear)
vKeyboard port
vMouse port
vATA-100 single-channel IDE controller
(bus mastering)
vATI ES1000 video controller
–Compatible with SVGA and VGA
–16 MB SDRAM video memory
Acoustical noise emissions (depending
on your model):
vSound power, idling: 5.6 bel or 6.0 bel
vSound power, operating: 6.0 bel or 6.1
bel
Diagnostic LEDs:
vFans
vMemory
vHard disk drives (redundant models)
vPower supply
Environment:
vAir temperature:
–Server on: 10° to 35°C (50° to 95°F)
Altitude: 0to 914 m(2998.0 ft)
–Server off: -40° to 60°C (-40° to 140°F)
Altitude: 0to 2133 m(7000.0 ft)
vHumidity (operating and storage): 8% to
80%
Heat output:
Approximate heat output in British thermal
units (Btu) per hour:
vMinimum configuration: 781 Btu per hour
(229 watts)
vMaximum configuration: 1910 Btu per hour
(560 watts)
Electrical input:
vSine-wave input (50 or 60 Hz) required
vInput voltage and frequency ranges
automatically selected
vInput voltage low range:
–Minimum: 100 Vac
–Maximum: 127 Vac
v
Input voltage high range:
–Minimum: 200 Vac
–Maximum: 240 Vac
vInput kilovolt-amperes (kVA) approximately:
–Minimum: 0.23 kVA (all models)
–Maximum: 0.57 kVA
Notes:
1. Power consumption and heat output vary
depending on the number and type of
optional features installed and the
power-management optional features in
use.
2. These levels were measured in controlled
acoustical environments according to the
procedures specified by the American
National Standards Institute (ANSI) S12.10
and ISO 7779 and are reported in
accordance with ISO 9296. Actual
sound-pressure levels in agiven location
might exceed the average values stated
because of room reflections and other
nearby noise sources. The declared
sound-power levels indicate an upper limit,
below which alarge number of computers
will operate.
Chapter 1. The System x3400 server 5

What your server offers
The server uses the following features and technologies:
vBaseboard management controller (BMC)
The BMC provides basic service-processor environmental monitoring functions. If
an environmental condition exceeds athreshold or if asystem component fails,
the BMC provides LEDs to help you diagnose the problem.
vHigh-performance graphics controller
The server comes with an onboard high-performance graphics controller that
supports high resolutions and includes many performance-enhancing features for
the operating-system environment.
vIBM Enhanced Diagnostics CD
The server comes with an IBM Enhanced Diagnostics CD, which you can use to
diagnose problems.
vIBM Director
IBM Director is aworkgroup-hardware-management tool that you can use to
centrally manage System x3400 servers. For more information, see the IBM
Director documentation on the IBM Director CD.
vIBM Enterprise X-Architecture technology
IBM X-Architecture technology combines proven, innovative IBM designs to make
your Intel-processor-based server powerful, scalable, and reliable. For more
information, see http://www.ibm.com/servers/eserver/xseries/xarchitecture/
enterprise/index.html.
vIBM ServerGuide Setup and Installation CD
The ServerGuide Setup and Installation CD provides programs to help you set up
the server (some models) and install an operating system. The ServerGuide™
program detects installed hardware options and provides the correct configuration
programs and device drivers.
For more information about the ServerGuide Setup and Installation CD, see
“Using the ServerGuide Setup and Installation CD” on page 81.
vIntegrated network support
The server comes with an integrated Broadcom NetXtreme Gigabit Ethernet
controller, which supports connection to a10-Mbps, 100-Mbps, or 1000-Mbps
network. For more information, see “Configuring the Broadcom Gigabit Ethernet
controller” on page 83.
vLarge data-storage capacity and hot-swap capabilities
Hot-swap models support up to eight slim-high, 3.5-inch hot-swap hard disk
drives in the hot-swap bays. With the hot-swap feature, you can add, remove, or
replace hard disk drives without turning off the server.
vLarge system-memory capacity
The server supports up to 32 GB (reduced to 16 GB in mirrored mode) of system
memory. The memory controller supports error correcting code (ECC) for up to
eight industry-standard, 2-way interleaved, x4 or x8, 1.8 V, 240-pin,
double-data-rate 2(DDR2), PC2-5300, 677 MHz, dynamic random-access
memory (DRAM) fully buffered (FBD) dual inline memory modules (DIMMs).
vMemory mirroring
Some models support memory mirroring. Memory mirroring replicates and stores
data in DIMMs within two branches simultaneously. To support memory mirroring,
you must have at least two pairs of DIMMs installed (a pair in each branch).
Pairs of DIMMs that are next to each other (for example, DIMM slot 1and DIMM
slot 4) within the channels of the same branch must be identical pairs of
6System x3400 Types 7973, 7974, 7975, and 7976: User’s Guide