Re: Checking consistency of Linux software RAID

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Hello Corey!

> This question has been on the tip of my tongue... Thanks for your answer...
>
> Out of curiousity, why do you use /dev/zero? Would dd to /dev/null cause
> problems or is /dev/zero required for proper results?
>

D'oh it seems I was a bit sleepy yesterday, of course, you are right - it has 
to be /dev/null! 
And of course, one can only read from /dev/zero. 

Sorry for posting improper commands.


Best regards,	
	Bernd


> >Hi,
> >
> >/proc/mdstat is to monitor the status of your raid, so when one drive
> >fails it
> >becomes dropped out of the raid-array. Using mdadm you can monitor
> >/proc/mdstat and it even can send you a mail when one of your disks fails.
> >So
> >if you really want to scan your disk once a week, why not running 'dd
> >if=/dev/mdX of=/dev/zero' ? So every block of every raid-disk should
> >become
> >read and the md-driver should automatically drop a failing disk  out of
> >the
> >raid.
> >I guess you could even try to repair a disk when it became dropped out of
> >the
> >raid by running some scripts, but since I never trusted any disk that had
> >failed ones, I never worried about it.
> >
> >Bernd
> >-
> >To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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>
> /\/\/\/\/\/\ Nothing is foolproof to a talented fool. /\/\/\/\/\/\
>
> coreyfro@coreyfro.com
> http://www.coreyfro.com/
> http://stats.distributed.net/rc5-64/psummary.php3?id=196879
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-- 
Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert@pci.uni-heidelberg.de
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