From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Small Subject: RAID mismatches (and reporting thereof) Date: Wed, 08 Sep 2010 10:40:53 +0100 Message-ID: <4C875A25.5080301@seoss.co.uk> References: <20100907141904.3696.qmail@science.horizon.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20100907141904.3696.qmail@science.horizon.com> Sender: linux-raid-owner@vger.kernel.org To: George Spelvin Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 07/09/10 15:19, George Spelvin wrote: > After some frustration with RAID-5 finding mismatches and not being > able to figure out which drive has the problem, I'm setting up a rather > intricate 5-way mirrored (x 2-way striped) system. > Out of interest, what systems are you seeing mismatches on? Most of the ones I've seen are on LSI1068* SAS controllers (with SATA drives, but not sure if that counts for anything, don't use many SAS drives) including the Dell SAS5* and SAS6* series. I suspect there are some corner cases where they corrupt data on disk. Should open a kernel.org bug really, so that LSI can ignore the issue in public... Tim. -- South East Open Source Solutions Limited Registered in England and Wales with company number 06134732. Registered Office: 2 Powell Gardens, Redhill, Surrey, RH1 1TQ VAT number: 900 6633 53 http://seoss.co.uk/ +44-(0)1273-808309