Memory options, Memory configurations, Advanced ecc memory – HP ProLiant DL380 G5 Server User Manual
Page 44
Hardware options installation 44
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
12 GB of active memory and 4 GB of online spare memory utilizing 2-GB FBDIMMs.
•
Mirrored Memory providing protection against failed FBDIMMs supporting up to 8 GB of active
memory and 8 GB of mirrored 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 QuickS
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 (on page
). 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.
•
FBDIMM pairs in a memory bank must have identical HP part numbers.
•
FBDIMMS must be populated as specified for each AMP memory mode.
The memory subsystem for this server is divided into two branches. Each memory branch is essentially a
separate memory controller. The FBDIMMs map to the two branches as indicated in the following table:
Branch 0
Branch 1
FBDIMM 1A
FBDIMM 5B
FBDIMM 3A
FBDIMM 7B
FBDIMM 2C
FBDIMM 6D
FBDIMM 4C
FBDIMM 8D
This multi-branch architecture provides enhanced performance in Advanced ECC mode. The concept of
multiple branches is important for the operation of online spare mode and mirrored memory mode.
If the server contains more than 4 GB of memory, consult the operating system documentation about
accessing the full amount of installed memory.
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