[linux-lvm] Isolation of volume groups
Bryn M. Reeves
bmr at redhat.com
Mon May 28 15:09:24 UTC 2012
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On 05/28/2012 03:33 PM, Fredrik Tolf wrote:
> Last night, one of the PVs in datvol had a transient SATA link
> failure and popped in and out of existence for a little while,
> which caused datvol and the LVs on it to fail. No permanent damage
> seems to have occurred, though, so I'm not too worried about that.
> I could bring datvol down and up again to make it work, so I guess
> everything worked as should be expected.
Are the devices for ravol and datvol on the same SATA bus or controller?
> What concerns me a little, however, is that ravol also seems to
> have been oddly affected by the failure of datvol. At times, the
> filesystems on it could hang for seconds, not responding; and while
> it was responding, XFS was intermittently outputting messages like
> May 28 14:58:58 nerv kernel: [30350.996032]
> xfs_force_shutdown(dm-33,0x1) called from line 335 of file
> Return address = 0xffffffffa01df02c
> May 28 14:51:38 nerv kernel: [29911.468028] Filesystem "dm-33":
> xfs_log_force: error 5 returned.
Errno 5 is EIO:
/usr/include/asm-generic/errno-base.h:#define EIO 5 /* I/O error */
So something below XFS returned EIO. This could happen due to IO
timeouts caused by link reset and error recovery on the other SATA device.
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