Source Disk Fails During Replace Member OperationIssue: The source disk fails during the Replace Member operation.CorrectiveAction:If the source data is available from other disks in the virtual disk, the rebuild beginsautomatically on the target disk, using the data from the other disks.Target Disk FailsIssue: The target disk fails.CorrectiveAction:If the target disk fails, the Replace Member operation aborts.General Disk FailsIssue: A general disk fails.CorrectiveAction:If the target disk fails and the Replace Member operation aborts but the sourcedata is still available, then the Replace Member operation continues as ReplaceMember.Linux Operating System ErrorsVirtual Disk Policy Is Assumed As Write-Through Error MessageError: kernel: sdb: asking for cache datafailed kernel: sdb: assuming drive cache: writethroughCorrectiveAction:The error message is displayed when the Linux Small Computer System Interface(SCSI) mid-layer asks for physical disk cache settings. The controller firmwaremanages the virtual disk cache settings on a per controller and a per virtual diskbasis, 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 thedevice node for a virtual disk. This value changes for each virtual disk.For more information about Write-Through cache, see Virtual Disk Write CachePolicies.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 thismessage. The cache policy settings for the PERC SAS RAID system remainunchanged.82
