Re: Checking consistency of Linux software RAID

[Bernd Schubert <bernd-schubert@web.de>]

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
> >the body of a message to majordomo@vger.kernel.org
> >More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
> /\/\/\/\/\/\ Nothing is foolproof to a talented fool. /\/\/\/\/\/\
>
> coreyfro@coreyfro.com
> http://www.coreyfro.com/
> http://stats.distributed.net/rc5-64/psummary.php3?id=196879
> ICQ : 3168059
>
> -----BEGIN GEEK CODE BLOCK-----
> GCS d--(+) s: a-- C++++$ UBL++>++++ P+ L+ E W+++$ N+ o? K? w++++$>+++++$
> O---- !M--- V- PS+++ PE++(--) Y+ PGP- t--- 5(+) !X- R(+) !tv b-(+)
> Dl++(++++) D++ G+ e>+++ h++(---) r++>+$ y++*>$ H++++ n---(----) p? !au w+
> v- 3+>++ j- G'''' B--- u+++*** f* Quake++++>+++++$
> ------END GEEK CODE BLOCK------
>
> Home of Geek Code - http://www.geekcode.com/
> The Geek Code Decoder Page - http://www.ebb.org/ungeek//
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 
Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert@pci.uni-heidelberg.de
-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html