Memory options, Memory configurations, Advanced ecc memory – HP ProLiant ML350 G5 Server User Manual
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Hardware options installation 36
Memory options
This server contains eight FBDIMM slots. You can expand server memory by installing supported
Registered DDR-2 FBDIMMs.
Memory configurations
The server supports the following Advanced Memory Protection (AMP) options to optimize server
availability.
•
Advanced ECC supporting up to 16 GB of active memory using 2-GB FBDIMMs.
•
Online Spare Memory providing additional protection against degrading FBDIMMs supporting up to
14 GB of active memory and 2 GB of online spare memory utilizing 2-GB FBDIMMs.
Maximum memory capacities for all AMP modes will increase with the availability of 4-GB and 8-GB
FBDIMMs, including a maximum of 64 GB in Advanced ECC mode. For the latest memory configuration
information, refer to the QuickSpecs on the HP website (
The Advanced Memory Protection option is configured in RBSU. By default, the server is set to Advanced
ECC mode. For more information, refer to HP ROM-Based Setup Utility. If the configured AMP mode is not
supported by the installed FBDIMM configuration, the system boots in Advanced ECC mode.
The following configuration requirements apply to all AMP modes:
•
FBDIMMS must be ECC Registered DDR-2 SDRAM FBDIMMs.
•
FBDIMMs must be installed in pairs.
•
FBDIMMS must be populated as specified for each AMP memory mode.
Advanced ECC memory
Advanced ECC memory is the default memory protection mode for this server. In Advanced ECC, the
server is protected against correctable memory errors. The server provides notification if the level of
correctable errors exceeds a pre-defined threshold rate. The server does not fail because of correctable
memory errors. Advanced ECC provides additional protection over Standard ECC because it is possible
to correct certain memory errors that would otherwise be uncorrectable and result in a server failure.
Whereas standard ECC can correct single-bit memory errors, Advanced ECC can correct single-bit
memory errors and multi-bit memory errors if all failed bits are on the same DRAM device on the
FBDIMM.
In addition to general configuration requirements, Advanced ECC memory also has the following
configuration requirements:
•
FBDIMMs must be installed in pairs unless operating in single-FBDIMM mode. The server supports
single-FBDIMM mode only in FBDIMM slot 1A.
•
FBDIMMs must be installed in sequential order, beginning with bank A.
In Advanced ECC mode, FBDIMMs must be populated as specified in the following table, unless a single
DIMM is used: