Re: mismatch_cnt again

Eyal Lebedinsky
2009-11-07T08:42:02Z

Michael,

This is something new to me. I never saw any message in any of the logs.

I am not a new linux user and neither am I unfamiliar with looking after
my system, yet I have never seen any messages related to these mismatches.

The first time I find out about this is when I run a raid 'check', and
even this scan does not produce any messages about the mismatch which
is simply logged into /sys/devices/virtual/block/md0/md/mismatch_cnt

Nov 7 03:05:02 e7 kernel: md: data-check of RAID array md0
Nov 7 03:05:02 e7 kernel: md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
Nov 7 03:05:02 e7 kernel: md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check.
Nov 7 03:05:02 e7 kernel: md: using 128k window, over a total of 976759808 blocks.
Nov 7 07:06:22 e7 kernel: md: md0: data-check done.

All intervening messages are unrelated (named verbiage).

Eyal

Michael Evans wrote:
> Your dmesg and/or the syslog stream of the same kernel warnings/info
> should show you when and where these errors occurred.
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--
Eyal Lebedinsky (eyal@eyal.emu.id.au)