Re: very very strange simultaneous RAID resync on sep 2, 01:06 CEST (+2)

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On Mon, Sep 03, 2007 at 09:56:10AM +0200, Xavier Bestel wrote:
> Hi,

Hi Xavier

> I have a server running with RAID5 disks, under debian/stable, kernel
> 2.6.18-5-686. Yesterday the RAID resync'd for no apparent reason,
> without even mdamd sending a mail to warn about that:
> 
> Sep  2 01:06:01 awak kernel: md: syncing RAID array md0

[snip]

> I'm still gathering informations (no idea what his disks are, etc.), but
> does anyone have the same problem ? Does anyone know where it can come
> from (debian trouble, md bug, drive firmware problem, rootkit, ..) and
> how I can pinpoint that ?

My debian installation has a system cronjob that will perform a resync
every first Sunday morning at 1:06 AM:

[root@oscar] cat /etc/cron.d/mdadm
...
6 1 * * 0 root [ -x /usr/share/mdadm/checkarray ] && [ $(date +\%d) -le 7 ] && /usr/share/mdadm/checkarray --cron --all --quiet

I did not read the manpage, but my guess is that 'quiet' will suppress
the mail notification.

Regards,
Patrick

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