Problem with RAID1 Disk on Freebsd

[Josh Paetzel]

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shakeb ainul wrote:
> Hi,
> 
> I am a developer with one of the top IT companies in Asia. I have the
> following problem with my RAID 1 server.
> 
> Last week, the only disk of my server failed due to unknown reason and it
> required a reboot of the server. Following error messages were logged in:
> 
> /var/log/messages
> 
> Nov 21 02:18:17 server1 kernel: ciss0: *** SCSI bus speed downshifted, SCSI
> port 2
> Nov 21 02:20:58 server1 kernel: ciss0: *** SCSI bus speed downshifted, SCSI
> port 2
> Nov 21 02:22:37 server1 kernel: ciss0: *** SCSI bus speed downshifted, SCSI
> port 2
> Nov 21 02:31:01 server1 kernel: ciss0: *** Physical drive failure: SCSI port
> 2 ID 1
> Nov 21 02:31:01 server1 kernel: ciss0: *** State change, logical drive 0
> Nov 21 02:31:01 server1 kernel: ciss0: logical drive 0 (da0) changed status
> OK->interim recovery, spare status 0x0
> 
> Attached is the dmesg.boot file of my server.
> 
> Please advise on what could be the possible causes for this fault and what
> can we do to ensure it does not happen again in future.
> 
> Thanks in anticipation.
> 
> Regards,
> SHAKEB AINUL

- From what I can tell based on the information you've provided a drive
failed in such a way that the controller tried stepping the bus down.
When that didn't help it faulted the drive out of the array.  But you
don't say, and it doesn't seem discernable from the information you
provided, what happened after that.

Did the server hang or reboot or something?

- --
Thanks,

Josh Paetzel

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