Linux Operating System Errors - Dell 6 series User Manual

Linux Operating System Errors

Table 7-8 describes issues related to the Linux operating system.
Table 7-8. Linux Operating System Errors
Error Message
<Date:Time> <HostName>
kernel: sdb: asking for
cache data failed
<Date:Time> <HostName>
kernel: sdb: assuming
drive cache: write
through
Suggested Solution
This error message displays 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.
See the section "Physical Disk Management" on
page 105 for more information about Write-
Through cache.
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 PERC6 SAS RAID system
remain unchanged.
Troubleshooting
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