From: linux@horizon.com
To: linux-raid@vger.kernel.org
Subject: Re: scrub was Re: RAID5 Problem - $1000 reward for help
Date: 21 Sep 2006 16:20:08 -0400 [thread overview]
Message-ID: <20060921202008.4872.qmail@science.horizon.com> (raw)
>> Does this test stress the discs a lot, like a resync?
>> How long does it take?
>> Can I use it on a mounted array?
> I'd like to add to this question -- does 'check' action on a RAID5 array
> verify the accuracy of parity data, blindly read back all data, or only
> verify readability of data blocks?
The former: it reads all data and verifies the parity.
It's a bit hard to see buried in drivers/md/raid5.c:handle_stripe5(),
which is more than a little intricate. If you search for
MD_RECOVERY_CHECK in there, you can see where it rewrites the newly
added disk if syncing or just notes the problem if checking.
next reply other threads:[~2006-09-21 20:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-21 20:20 linux [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-09-15 9:08 RAID5 Problem - $1000 reward for help Reza Naima
2006-09-17 10:55 ` Ask Bjørn Hansen
2006-09-17 11:36 ` Tuomas Leikola
2006-09-17 12:46 ` scrub was " Dexter Filmore
2006-09-17 13:21 ` Tuomas Leikola
2006-09-21 18:45 ` Rob Bray
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