Servicing the DIMMs (CRU)
This section describes how to service memory modules (DIMMs). DIMMs are customer-
replaceable units (CRUs) that require you to power off the server. For more information
about CRUs, see “Illustrated Parts Breakdown” on page 20 and “Customer-Replaceable
Units” on page 21.
The Oracle Server X8-2L supports a variety of DIMM configurations that can include quad-
rank (QR) and dual-rank (DR) DIMMs.
Caution - These procedures require that you handle components that are sensitive to
electrostatic discharge. This sensitivity can cause the components to fail. To avoid
damage, ensure that you follow antistatic practices as described in “Electrostatic Discharge
Safety” on page 52.
Caution - Ensure that all power is removed from the server before removing or installing
DIMMs, or damage to the DIMMs might occur. You must disconnect all power cables from the
system before performing these procedures.
The following topics and procedures provide information to assist you when replacing a DIMM
or upgrading DIMMs:
■
“DIMM and Processor Physical Layout” on page 120
■
“DIMM Population Scenarios” on page 121
■
“DIMM Population Rules” on page 122
■
“Populating DIMMs for Optimal System Performance” on page 123
■
“Populating DIMMs in Single-Processor Systems for Optimal System
Performance” on page 123
■
“Populating DIMMs in Dual-Processor Systems for Optimal System
Performance” on page 125
■
“DIMM Operating Speeds” on page 126
■
“DIMM Rank Classification Labels” on page 126
■
“Inconsistencies Between DIMM Fault Indicators and the BIOS Isolation of Failed
DIMMs” on page 127
Servicing the DIMMs (CRU) 119
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