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Source disk fails during replace member operation
Issue: The source disk fails during the Replace Member operation.
Corrective
Action:
If the source data is available from other disks in the virtual disk, the rebuild begins
automatically on the target disk, using the data from the other disks.
Target disk fails
Issue: The target disk fails.
Corrective
Action:
If the target disk fails, the Replace Member operation aborts.
General disk fails
Issue: A general disk fails.
Corrective
Action:
If the target disk fails and the Replace Member operation aborts but the source
data is still available, then the Replace Member operation continues as Replace
Member.
Linux operating system errors
Virtual disk policy is assumed as write-through error message
Error:
<Date:Time> <HostName> kernel: sdb: asking for cache data
failed
<Date:Time> <HostName> kernel: sdb: assuming drive cache: write
through
Corrective
Action:
The error message is displayed when the Linux Small Computer System Interface
(SCSI) mid-layer asks for physical disk cache settings. The controller firmware
manages the virtual disk cache settings on a per controller and a per virtual disk
basis, so the firmware does not respond to this command. The Linux SCSI mid-
layer assumes that the virtual disk's cache policy is Write-Through. SDB is the
device node for a virtual disk. This value changes for each virtual disk.
For more information about Write-Through cache, see Virtual Disk Write Cache
Policies.
Except for this message, there is no effect of this behavior on normal operation.
The cache policy of the virtual disk and the I/O throughput are not affected by this
message. The cache policy settings for the PERC SAS RAID system remain
unchanged.
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