HP ProLiant DL980 G7, Руководство по техническому обслуживанию и ремонту

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NOTE: ProLiant DL980 G7 servers may be unable to provide MMIO (Memory Mapped I/O)
memory to all slotted PCI devices during Power-On Self-Test (POST) in large I/O configurations,
resulting in the following warning message:
NOTE: When an HP ProLiant DL980 G7 server is configured with a DIMM that has an
uninitialized SPD area, and the server is running any version of the System ROM detailed in the
Scope section below, the Survey Utility in HP SmartStart will report the "Correctable Error Threshold
Count" for the DIMM as "Feature Not Supported." However, this is incorrect. The DIMM does
actually support "Correctable Error Threshold Count." This issue is only observed when using the
Survey Tool in HP SmartStart. In addition, this issue does not affect the operation or functionality
of the server or of ECC. It only affects the reporting of ECC capabilities in the DIMM SPD and does
not impact any other system operation. Any ProLiant DL980 G7 server configured with a P66
System ROM dated 07/07/2010, 07/27/2010, or 01/27/2011 and using the Survey Tool in
SmartStart (any version) may see this issue.
This is only a reporting issue and can be safely ignored. It does not affect the operation or
functionality of the server or of ECC. It only affects the reporting of ECC capabilities in the DIMM
SPD and does not impact any other system operation. To prevent this issue from occurring, or to
correct it after it has already occurred, update the System ROM to a version dated 03/24/2011
(or later).
DIMM support
The server supports the following DIMMs:
•
Single- and dual-rank PC3-10600 (DDR3-1333) DIMMs operating at 1066 MT/s
While single-rank DIMMs are supported, HP recommends dual-rank and quad-rank DIMMs
since they provide significant memory throughput and better memory protection (Online Spare
memory mode) over single-rank DIMMs.
•
Quad-rank PC3-8500 (DDR3-1066) DIMMs operating at 1066 MT/s
Single-, dual-, and quad-rank DIMMs
To understand and configure memory protection modes properly, an understanding of single-,
dual-, and quad-rank DIMMs is helpful. Some DIMM configuration requirements are based on
these classifications.
A single-rank DIMM has one set of memory chips that is accessed while writing to or reading from
the memory. A dual-rank DIMM is similar to having two single-rank DIMMs on the same module,
with only one rank accessible at a time. A quad-rank DIMM is effectively two dual-rank DIMMs on
the same module. Only one rank is accessible at a time. The server memory control subsystem
selects the proper rank within the DIMM when writing to or reading from the DIMM.
Dual- and quad-rank DIMMs provide the greatest capacity with the existing memory technology.
For example, if current DRAM technology supports 2-GB single-rank DIMMs, a dual-rank DIMM
would be 4-GB and a quad-rank DIMM would be 8-GB.
Although only one data rank is accessed at any given time for each DIMM, optimized command
and address pipelining via various interleaving schemes enables the Intel® Xeon™ 7500-series
processor architecture to benefit from dual-rank and quad-rank DIMMs. A dual-rank DIMM performs
significantly better than its single-rank counterpart. A quad-rank DIMM provides further performance
improvement even at the same DIMM capacity.
34 Removal and replacement procedures