From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Clements Subject: Re: Convert raid5 to raid1? Date: Thu, 10 Mar 2005 19:11:23 -0500 Message-ID: <4230E22B.6070206@steeleye.com> References: <4230BE56.6090905@advocap.org> <4230D279.5090101@wasp.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: <4230D279.5090101@wasp.net.au> Sender: linux-raid-owner@vger.kernel.org To: Brad Campbell Cc: John McMonagle , linux-raid@vger.kernel.org List-Id: linux-raid.ids 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