Single-Board Mirrored Memory Technology - HP ML570 - ProLiant - G2 Installation Manual

Single-Board Mirrored Memory Technology

This section details the features and DIMM installation requirements for single-board
mirrored memory.
Features
Single-board mirrored memory uses mirrored banks on a single memory board to
provide a high level of memory redundancy. Single-board mirrored memory has the
following advantages:
•
Single-board mirrored memory provides protection against multi-bit errors. If a
DIMM on the memory board has a multi-bit error, the system reads from the
mirrored banks instead.
•
If configured for single-board mirrored memory, the ProLiant ML500 series
Generation 2 servers can support up to 8 GB of system memory and 8 GB of
redundant memory using 2-GB DIMMs.
IMPORTANT: DIMMs in the redundant banks must be configured identically to the banks they
are mirroring.
IMPORTANT: If a DIMM exceeds the HP pre-defined limit for single-bit correctable errors, the
system does not fail over to the redundant banks, but does notify you of the condition through
Insight Manager 7, the memory board LEDs, and the front-panel internal health LED.
Single-board mirrored memory is configured with one memory board only, which
must be installed in memory board slot 1. Bank C mirrors bank A, and, if populated,
bank D mirrors bank B. If any DIMM in bank A or bank B has a multi-bit error, the
system performs the following actions:
•
Rereads the correct data from the redundant memory banks
•
Performs all future reads from the redundant memory banks
•
Provides notification of the DIMM failure via the memory board LEDs, the
front-panel internal health LED, and Insight Manager 7
HP ProLiant ML500 Series Generation 2 Server Memory Installation Guide
Memory
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