
9-22 Upgrading Your Server
Memory Mirroring
The CPU blade supports the memory mirroring feature.
To use this feature, install the standby DIMMs as spare, then select the supported feature from the
BIOS SETUP.
To enable the memory mirroring feature:
The memory mirroring feature puts a DIMM into standby status as spare memory. If an
unrecoverable error occurs in the running memory board, the feature automatically
changes the running DIMM from the failed one to a standby one to continue the
processing.
To enable Memory Mirroring to operate effectively, the memory group in each
combination should contain DIMMs of the same capacity. (The area to install DIMMs #01
and #02, #05 and #6, #9 and #10, or #13 and #14 must coincide with the area to install
DIMMs #03 and #04, #7 and #8, #11 and #12, or #15 and #16, respectively.)
The table below shows examples of DIMM installation patterns.
DIMM
#01, #02
DIMM
#03, #04
DIMM
#05, #06
DIMM
#07, #08
DIMM
#09, #10
DIMM
#11, #12
DIMM
#13, #14
DIMM
#15, #16
2GB (1GB×2) 2GB (1GB×2) – – – – – –
2GB (1GB×2) 2GB (1GB×2) 4GB (2GB×2) 4GB (2GB×2) – – – –
2GB (1GB×2) 2GB (1GB×2) 2GB (1GB×2) 2GB (1GB×2) – – – –
2GB (1GB×2) 2GB (1GB×2) 4GB (2GB×2) 4GB (2GB×2) 8GB (4GB×2) 8GB (4GB×2) – –
4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) – –
2GB (1GB×2) 2GB (1GB×2) 4GB (2GB×2) 4GB (2GB×2) 8GB (4GB×2) 8GB (4GB×2)
1GB
(512MB×2)
1GB
(512MB×2)
8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2)
IMPORTANT: To use the feature, DIMMs must be installed
according to the predefined condition. If the installed DIMMs do not
satisfy the condition, a POST error will occur.
Parameters in BIOS SETUP
Run BIOS SETUP (see Chapter 4), select [Advanced] - [Memory Configuration] -
[Memory RAS Feature], and change parameter to [Mirroring]. The factory-set value for
this parameter is [Normal].
Others
– The memory capacity indicated by operating system is as follows:
Total physical capacity of memory installed – Capacity of standby memory
(The operating system only recognizes a half of the total physical capacity.)
– Enabling the memory mirroring feature does not affect the operation of application
program.
– The feature is automatically disabled if the following error message is displayed on
POST.
8201: Mirror Memory was not ready.
Kommentare zu diesen Handbüchern