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From: Paul Clements <paul.clements@steeleye.com>
To: Brad Campbell <brad@wasp.net.au>
Cc: John McMonagle <johnm@advocap.org>, linux-raid@vger.kernel.org
Subject: Re: Convert raid5 to raid1?
Date: Thu, 10 Mar 2005 19:11:23 -0500	[thread overview]
Message-ID: <4230E22B.6070206@steeleye.com> (raw)
In-Reply-To: <4230D279.5090101@wasp.net.au>

Brad Campbell wrote:
> John McMonagle wrote:

> I just wonder about the comment "considering the current state of 
> raid5". What might be wrong with raid5 currently? 

Perhaps he's referring to the possibility of undetectable data 
corruption that can occur with software raid5? Granted, there's a very 
small chance of it happening, but if your array becomes degraded (i.e., 
you lose a disk, which with the way md currently works, only takes one 
bad block) and then you have a server crash (or other unclean shutdown 
of your array), you likely will suffer data corruption.

See this for more details:

http://www.cs.helsinki.fi/linux/linux-kernel/2002-19/0906.html

--
Paul

      parent reply	other threads:[~2005-03-11  0:11 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-03-10 21:38 Convert raid5 to raid1? John McMonagle
2005-03-10 22:34 ` Frank Wittig
2005-03-10 23:04 ` Brad Campbell
2005-03-10 23:13   ` Guy
2005-03-11  0:02   ` John McMonagle
2005-03-11  3:09     ` Guy
2005-03-11  8:58     ` David Greaves
2005-03-11  0:11   ` Paul Clements [this message]

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