On 2013-04-13 00:42, Andrew McGlashan wrote:
Hi,
On 11/04/2013 12:28 PM, Matthew Cengia wrote:
With a pair of 2TB Western Digital SATA drives in my server, both in RAID 1:
| mattcen@adam:tmp$ zgrep -h 'mismatches found' /var/log/syslog* | sort -n | 2012-02-05T22:05:03.118792+11:00 adam mdadm[1545]: RebuildFinished event detected on md device /dev/md/1, component device mismatches found: 10496 | 2012-03-04T17:00:12.084923+11:00 adam mdadm[1724]: RebuildFinished event detected on md device /dev/md/1, component device mismatches found: 11008 | 2012-04-01T18:20:08.394369+10:00 adam mdadm[1724]: RebuildFinished event detected on md device /dev/md/1, component device mismatches found: 10496 | 2012-05-06T16:42:59.386193+10:00 adam mdadm[1724]: RebuildFinished event detected on md device /dev/md/1, component device mismatches found: 10240
I would lay odds (and I'm not a betting man) that /dev/md/1 is your swap file, this is perfectly normal in this case.
I've seen this before, my solution to stop seeing this is to have swap on it's own RAID, and LVM volumes on different RAID devices.
Andrew, You're exactly right; I'd forgotten this particular data point; all 3 systems from which I pulled these mismatch messages have swap space inside the LVM PV living on /dev/md/1, which completely explains these messages. -- Regards, Matthew Cengia