Table 3.4 Memory Operation Mode Before And After Reserved Sb Switching, When A Partition Is Configured From One Sb - Fujitsu PRIMEQUEST 2000 Series Administration Manual

CHAPTER 3 Component Configuration and Replacement (Add, Remove)
3.2 High availability configuration
- Reserved SB is used in case of hardware failure. The cause of switching to the Reserved SB from the
memory dump report cannot be determined. See the system event log of the MMB to find out the cause
of switching to the Reserved SB. The memory dump information is used for determining software failures.
- In a Windows installed partition, restart is prompted at the first startup, after switching to the Reserved
SB. Restart is done following instructions.
- In a Windows installed partition, when the operation is stopped during an SB failure, the time taken for
restarting has to be considered. The total time taken for two restarts, the reboot time and the time it
takes for the first startup after switching to the Reserved SB will be required. Besides, restart can be
carried out once, at the first startup when there is a failure, by implementing workaround in advance. For
details on the workaround, see '● Procedure to prevent Windows restart' of '3.4.3 Reserved SB Setting'
in "PRIMEQUEST 2000 series Installation Manual" (C122-E174)
Reserved SB definition
The definition of the Reserved SB is automatically canceled after the Reserved SB operates.
Note
When restoring during maintenance after the Reserved SB operation, replace the faulty unit and reset the
Reserved SB information from the Web-UI.
Reserved SB Setting Rules
The Reserved SB setting criteria are as follows.
- Any SB not belonging to the own partition can be set as a Reserved SB
- An SB can be set as a Reserved SB for multiple partitions.
- Multiple Reserved SBs can be set for a single partition.
- If a partition is configured by a single SB, the CPU and DIMM of the Reserved SB must comply with the
installation rules in the Reserved SB. (*1)
- Two CPUs must be mounted on a Reserved SB.
- If a partition is configured by multiple SBs, only the SB with the DIMM configuration that meets the
mounting order of the Memory Operation Mode, which is the same as the source SB, can be set as a
Reserved SB.
- If a partition is configured by multiple SBs, only the SB that meets criteria for mixing the CPUs with the
partition can be set as the Reserved SB.
- If a partition is configured by multiple SBs, only the SB that meets the conditions for mixing DIMM with the
partition can be set as the Reserved SB.
- The SB that is set as the Reserved SB, is set from the MMB Web-UI, and can be incorporated in an
arbitrary partition. At that time, the Reserved SB settings for the incorporated destination partition will be
canceled. The Reserved SB settings for other partitions will be continued.
*1: If a partition is configured of one SB, the Source SB is disconnected from the partition by Reserved SB
switching. Therefore, there is no need to consider the DIMM and CPU mixing criteria between the
Reserved SB and the source SB. There may be one or two CPUs for a Reserved SB. The Reserved SB
need not consider Yes/No for Memory Mirroring / Sparing. However, if the DIMM configuration of the
Reserved SB is different from the switching source SB, the Memory Operation Mode may change after
switching to the Reserved SB switching may change from the Memory Operation Mode of the source SB.
Specific changes in the Memory Operation Mode before and after Reserved SB are shown below.
TABLE 3.4 Memory Operation Mode before and after Reserved SB switching, when a partition is configured
Source SB Memory Operation
Mode
Mirror
Mirror
from one SB.
SB DIMM configuration for Reserved
SB
Normal
Mirror
Spare
Normal or Mirror (*1)
Normal or Mirror or Spare (*2)
Normal
Mirror
Spare
Normal or Mirror (*1)
37
Memory Operation Mode after
Reserved SB switching
Normal
Mirror
Spare
Normal
Normal
Normal
Mirror
Spare
Mirror
C122-E175-02EN