IBM 71455DU manual Memory module, Memory card order Dimm pair

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Memory module

The following notes describe the types of dual inline memory modules (DIMMs) that the server supports and other information that you must consider when installing DIMMs:

vThe server supports 333 MHz, 1.8V, 240 pin, PC2-3200 single-ranked double data-rate (DDR) II, registered synchronous dynamic random-access memory (SDRAM) with error correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest PC2-3200 SDRAM Registered DIMM specifications. For a list of the supported options for the server, see http://www.ibm.com/servers/ eserver/serverproven/compat/us/.

vThe server supports up to four memory cards. Each memory card holds up to four DIMMs.

vThere must be at least one memory card with one pair of DIMMs installed for the server to operate.

vWhen you install additional DIMMs on a memory card, be sure to install them in pairs. All the DIMM pairs on each memory card must be the same size, and type.

vYou do not have to save new configuration information to the BIOS when installing or removing DIMMs. The only exception is if you replace a DIMM that was marked as Disabled in the Memory Settings menu. In this case, you must re-enable the row in the Configuration/Setup Utility program or reload the default memory settings.

vWhen you restart the server after adding or removing a DIMM, the server displays a message that the memory configuration has changed.

vInstall the DIMMs on each memory card in the order shown in the following tables, depending on which memory configuration you want to use. You must install at least one pair of DIMMs on each memory card.

Table 3. Primary memory card installation sequence

Memory card order

Memory card

DIMM pair

 

 

 

First

1

1 and 3

 

 

 

Second

2

1 and 3

 

 

 

Third

3

1 and 3

 

 

 

Fourth

4

1 and 3

 

 

 

Fifth

1

2 and 4

 

 

 

Sixth

2

2 and 4

 

 

 

Seventh

3

2 and 4

 

 

 

Eighth

4

2 and 4

 

 

 

Table 4. Alternate memory card installation sequence

 

 

 

 

Memory card order

Memory card

DIMM pair

 

 

 

First

1

1 and 3

 

 

 

 

 

2 and 4

 

 

 

Second

3

1 and 3

 

 

 

 

 

2 and 4

 

 

 

Third

2

1 and 3

 

 

 

 

 

2 and 4

 

 

 

32IBM System x3950 Type 8878 and System x3950 E Type 8879: User’s Guide

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Contents User’s Guide Page User’s Guide Page Contents Page Safety Page To Connect To Disconnect Do not ≥ 18 kg 39.7 lb ≥ 32 kg 70.5 lb ≥ 55 kg 121.2 lb Page System x3950 and System x3950 E server Related documentationProblem Determination and Service Guide Features and specifications Features and specifications What your server offers Light path diagnostics PowerExecutive Redundant connectionRedundant cooling and power capabilities Integrated network supportReliability, availability, and serviceability UpdateXpress program IBM DirectorServer controls, connectors, LEDs, and power Front viewPage Rear view Server power features Turning on the server Turning off the serverPage Installing options Server componentsBoard internal connectors and jumpers Jumper name DescriptionMemory-card connectors Memory-card LEDsMicroprocessor-board connectors and LEDs PCI-X board connectors PCI-X board LEDsSAS-backplane connectors Installation guidelines Working inside the server with the power on System reliability guidelinesHandling static-sensitive devices Removing the cover and bezelInstalling a hot-swap power supply Locking latch Locking handle open Installing an adapter ServeRAID-8i adapter ServeRAID-8i slot LED Adapter guide Installing a hot-swap hard disk drive Installing options Memory module Memory card order Dimm pairActive Memory Select Memory Settings Select Memory Mirroring Settings Hot-replacing a memory card Adding and replacing a memory cardAdding a memory card Installing DIMMs Installing a DimmDcac Hot-swapping DIMMs Installing options Hot-adding DIMMs Dimm Microprocessor Microprocessor installation order Installing a microprocessor Air baffle Heat sink Microprocessor connector Microprocessor- release lever Completing the installation Front view Connecting the cablesRear view SMP Expansion cabling Updating the server configurationTwo-node configuration Four-node configuration Protective cover Eight-node configuration Node SMP Expansion cable Page Installing options Page Configuration/Setup Utility program Boot Menu programGigabit Ethernet controller configuration process SAS/SATA Configuration Utility programConfiguration/Setup Utility menu choices Using the Configuration/Setup Utility programStarting the Configuration/Setup Utility program Power-on Password Administrator PasswordSystem Card Data Devices and I/O PortsAdvanced Setup Memory SettingsRSA II Settings System Partition VisibilityBaseboard management controller BMC settings BMC Post Watchdog TimeoutBMC Serial Port Access Mode Reboot system on NMIPasswords Power-on passwordUsing the ServerGuide Setup and Installation CD Administrator passwordServerGuide features Setup and configuration overviewTypical operating-system installation Installing your operating system without ServerGuideUsing the Boot Menu program Download section, click Downloads & driversConfiguring the Gigabit Ethernet controller Using the PXE boot agent utility programStarting the PXE boot agent utility program PXE boot agent utility menu choicesBanner Message Timeout Pre-boot Wake on LANCommand-line interface Ipmi Shell Link SpeedUpdating and configuring the Bios Configuring Linux Configuring Red Hat Enterprise Linux ESOriginal /etc/lilo.conf contents Add the following five lines between the two title= sections Original /boot/grub/grub.conf contents Suse Sles 8.0 configuration Append the following text to the first title line Configuring a Microsoft Windows operating system Original bootcfg program outputInstalling the OSA SMBridge management utility program Modified bootcfg program outputUsing the baseboard management controller utility programs Using the OSA SMBridge management utility program Using the SAS/SATA Configuration Utility program Starting the SAS/SATA Configuration Utility programUsing ServeRAID Manager SerialSelect Utility menu choicesConfiguring the controller Using express configurationUsing custom configuration Click Express configurationCreating a scalable partition Viewing the configurationUsing the Scalable Partition Web Interface Page Configuring the server Page Deleting a scalable partition Page Updating IBM Director Page Appendix. Notices TrademarksImportant notes Product recycling and disposal Page Index LED SAS Memory-mirroring configuration Page Part Number 31R1871