Memory
Single-Board Mirrored Memory Technology
Features
Single-board mirrored memory uses mirrored banks on a single memory board to
provide a comprehensive level of protection against two common types of memory
errors. Single-board mirrored memory has the following advantages:
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Single-board mirrored memory provides protection against both single-bit and
multi-bit errors. If a DIMM on the memory board has a multi-bit error the system
reads from the mirrored bank instead.
If configured for single-board mirrored memory, the ProLiant DL580
Generation 2 server can support up to 8 GB of system memory and 8 GB of
redundant memory using 2-GB DIMMs.
IMPORTANT:
DIMMs in the redundant bank must be configured identically to the bank they
are mirroring.
IMPORTANT:
If a DIMM exceeds the HP defined limit for single-bit correctable errors, the
system will not fail over to the redundant bank, but will notify you of the condition through
Insight Manager 7.
Single-board mirrored memory is configured with one memory board only, which
must be installed in memory board slot 1. Bank B mirrors bank A. 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 bank
Performs all future reads from the redundant memory bank
Provides notification of the DIMM failure using the memory board LEDs, the
front panel internal health LED, Insight Manager 7, and the QuickFind
Diagnostic Display
This process occurs without intervention or server interruption, and enables you to
replace the degraded DIMM at your convenience during a regularly scheduled
shutdown. Multi-bit errors are detected at the bank level rather than the DIMM level,
so if a multi-bit error occurs, all DIMMs in the bank must be replaced.
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HP ProLiant DL580 Generation 2 Server Setup and Installation Guide
HP CONFIDENTIAL
Writer: Karen Hale File Name: g-ch6 Memory.doc
Codename: Wave Part Number: 230835-003 Last Saved On: 6/26/03 9:35 AM
