Re: md strange sync?

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On Thu, May 27, 2010 at 5:31 AM, jose nuno neto <jose.neto@xxxxxxxxxxx> wrote:
> Hi2all
>
> I have RedHat 5.5 ( kernel  2.6.18-194.el5 ) and 2hard disk with raid1
> with md
>
> I have this setup on several machines, and recently notice this messages
> in /var/log/messages
>
> Are this normal? Seems a re-sync but happened on several machines..
>
> May 23 04:22:01 <kern.info> dc2-x6250-a kernel: md: syncing RAID array md0
> May 23 04:22:01 <kern.info> dc2-x6250-a kernel: md: minimum _guaranteed_
> reconstruction speed: 1000 KB/sec/disc.
> May 23 04:22:01 <kern.info> dc2-x6250-a kernel: md: using maximum
> available idle IO bandwidth (but not more than 200000 KB/sec) for
> reconstruction.
> May 23 04:22:01 <kern.info> dc2-x6250-a kernel: md: using 128k window,
> over a total of 256896 blocks.
> May 23 04:22:01 <kern.info> dc2-x6250-a kernel: md: delaying resync of md1
> until md0 has finished resync (they share one or more physical units)
> May 23 04:22:04 <kern.info> dc2-x6250-a kernel: md: md0: sync done.
> May 23 04:22:04 <kern.info> dc2-x6250-a kernel: md: syncing RAID array md1
> May 23 04:22:04 <kern.info> dc2-x6250-a kernel: md: minimum _guaranteed_
> reconstruction speed: 1000 KB/sec/disc.
> May 23 04:22:04 <kern.info> dc2-x6250-a kernel: md: using maximum
> available idle IO bandwidth (but not more than 200000 KB/sec) for
> reconstruction.
> May 23 04:22:04 <kern.info> dc2-x6250-a kernel: md: using 128k window,
> over a total of 8193024 blocks.
> May 23 04:23:41 <kern.info> dc2-x6250-a kernel: md: md1: sync done.
>
>
> thanks for any info
>
> regards
> jose
>
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You probably have an automated scrubbing setup in a cronscript.  This
is a good thing as it prevents silent write-errors from going
un-detected until some other drive fails and you suddenly lack
sufficient good devices for that stripe to recover it.
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