From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: Raid corruption problems. Date: Tue, 19 Dec 2006 16:39:54 -0500 Message-ID: <45885C2A.40602@tmr.com> References: <4582FD12.90806@advocap.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4582FD12.90806@advocap.org> Sender: linux-raid-owner@vger.kernel.org To: John McMonagle Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids John McMonagle wrote: > Have a raid1 backup server that seems to get corrupted. > This is the 3rd time in about a year. > Have 2 other backup servers that were cloned from this one that have > no problems. > > Done a couple kernel upgrades recently. > Now has 2.6.18-2 kernel. > It's based on Debian sarge. > > It's a low end Intel server motherboard using ata_piix sata driver. > Have another mother board just like doing raid1 with sata drives that > has had no problems but it has a much lighter disk load. > smartctl has never shown any problems. > In /sys/block/md2 did > echo check > syncaction > No error messages but mismatch_cnt is 1152. > rc0/errors and rc1/errors are both 0. > > I'm guessing a hardware problem. > Any suggestions? Since memory is the easiest to test, I'd try memtest86+ for at least 12 hr. If this were PATA I'd suggest replugging the cables, but it's lower probability with SATA. Still, probably worth trying. -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979