HP DL380z Betriebsanweisung PDF herunterladen (Seite 51)

that is degrading. This allows DIMMs that have a higher probability of receiving an uncorrectable

memory error (which would result in system downtime) to be removed from operation.

Advanced Memory Protection options are configured in the BIOS/Platform Configuration (RBSU). If the

requested AMP mode is not supported by the installed DIMM configuration, the server boots in Advanced ECC

mode. For more information, go to the HP UEFI System Utilities User Guide for HP ProLiant Gen9 Servers on

the HP website

http://www.hp.com/go/uefi/docs.

Table 5-1 Maximum capacity

DIMM type DIMM rank One processor Two processors

RDIMM Single-rank (8 GB) 96 GB 192 GB

RDIMM Dual-rank ( 16 GB) 192 GB 384 GB

LRDIMM Quad-rank (32 GB) 384 GB 768 GB

For the latest memory configuration information, see the QuickSpecs on the HP website

(

http://www.hp.com/go/qs).

Advanced ECC memory configuration

Advanced ECC memory is the default memory protection mode for this server. Standard ECC can correct

single-bit memory errors and detect multi-bit memory errors. When multi-bit errors are detected using

Standard ECC, the error is signaled to the server and causes the server to halt.

Advanced ECC protects the server against some multi-bit memory errors. Advanced ECC can correct both

single-bit memory errors and 4-bit memory errors if all failed bits are on the same DRAM device on the DIMM.

Advanced ECC provides additional protection over Standard ECC because it is possible to correct certain

memory errors that would otherwise be uncorrected and result in a server failure. Using HP Advanced

Memory Error Detection technology, the server provides notification when a DIMM is degrading and has a

higher probability of uncorrectable memory error.

Online Spare memory configuration

Online spare memory provides protection against degraded DIMMs by reducing the likelihood of uncorrected

memory errors. This protection is available without any operating system support.

Online spare memory protection dedicates one rank of each memory channel for use as spare memory. The

remaining ranks are available for OS and application use. If correctable memory errors occur at a rate higher

than a specific threshold on any of the non-spare ranks, the server automatically copies the memory

contents of the degraded rank to the online spare rank. The server then deactivates the failing rank and

automatically switches over to the online spare rank.

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HP DL380z Betriebsanweisung Seite 51