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Sun Fire X4800 Server Product Notes     Sun Fire X4800 Server Documentation
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Document Information

Using This Documentation

Overview of the Sun Fire X4800 Server Product Notes

Supported Software and Firmware

Hardware Issues

Reset Takes a Long Time and Causes the Server to Power Cycle

Update SP Firmware After Replacing a CMOD or SP Module (15465497)

MegaCLI CfgEachDskRaid0 Command Does Not Work Correctly (CR 7121867)


DIMM Mismatch on Odd Numbered Pairs Results in DDR Training Failed on Entire Branch (CR7101624 and CR7111545)

If DIMM Failure Causes Branch Failure, Oracle ILOM Might Not Identify Them as Faulty (CR7099038 and CR7111543)

When Inserting a CMOD, Simultaneously Rotate Handles Until They Touch the Chassis

Video Output of CMM Is Distorted or Missing


SATA Drives Not Accessible Through NEM1 (CR 7003993)

Supported Rack Mounting Configuration

DIMM Population Rules

Locking Screws Secure Shelf Rails to Rear Mounting Brackets

How to Install the Locking Screws

Message About Missing Disks After Failed Boot (CR 6939507)


System Does Not Power Up After Power Cycling (CR 6950414)


System Does Not Recognize DIMM Due to SPD Corruption (CR 6946921)

How to Identify a Corrupted DIMM

Oracle Solaris 10 Operating System Issues

Linux Issues

Oracle VM Issues

Windows Operating System Issues

ESX Issues

Oracle ILOM Enhancements and Issues

Oracle Hardware Installation Assistant Issues

BIOS Issues

DIMM Population Rules

This section provides the rules for adding and replacing DIMMs on a CMOD. It updates and enhances the information in DIMM Population Rules in Sun Fire X4800 Server Service Manual.

For additional information, including how to prepare the system for servicing, how to remove a CMOD, and how to remove or replace DIMMs, see Removing and Installing Components in Sun Fire X4800 Server Service Manual.

Each CMOD has 32 DIMM slots, with 16 allocated to each CPU. CMODs are shipped with configurations of 16 or 32 DIMMs, meaning that each CPU has either 8 or 16 DIMMs.

The rules for adding and replacing DIMMs are:

Matching Parameters

There are four parameters to consider when replacing DIMMs: size, speed, density, and manufacturer's model number.

The following table shows the requirements.

Parameter and Value
Match Within CMOD
Match Within Pairs
Size — 2 GB, 4 GB, or 8 GB
Speed — 1066 MHz JEDEC or DDR3 ECC RDIMMs
Density — Single or dual rank
Manufacturer's model number
DIMM Population Order

You can add DIMMs according to the following rules:

The following figure shows the location of the DIMMs on the CMOD.

image:Location of DIMMs on CMOD.
Towards the front of the CMOD