[CLUG-chat] Linux Software RAID randomly checking disks?

Mark Ter Morshuizen mark at itbox.co.za
Mon Nov 5 08:26:37 SAST 2007

On Monday 05 November 2007 08:17, Jonathan Endersby wrote:
> The other day I came home to find my computer running at 100% cpu and
> basically croaking.
> Top revealed that RAID was working hard, dmesg is posted later in the
> email. /proc/mdstat revealed that the disks were all resyncing.  The
> arrays are now fine and the sync has finished.
> Does anyone know why this would be happening? Does Linux software raid
> occasionally just do this? Should I be worrying?

Hi Jonathan,

Yes, current software RAID has an option to check the arrays periodically. 
Apparently you have this enabled. I'm  not sure that checking involves 
re-syncing though. Perhaps there was some sort of problem found? If so it 
should be in your logs.

Mark Ter Morshuizen
mark at itbox.co.za
082 542 6484
2U Rackmount Casings: http://www.rackmount.co.za

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