From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Hardcastle Subject: Re: Fw: Why does one get mismatches? Date: Mon, 25 Jan 2010 02:52:58 -0800 (PST) Message-ID: <957236.22933.qm@web51307.mail.re2.yahoo.com> References: <87y6jmxygf.fsf@frosties.localdomain> Reply-To: Jon@eHardcastle.com Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <87y6jmxygf.fsf@frosties.localdomain> Sender: linux-raid-owner@vger.kernel.org To: Jon@eHardcastle.com Cc: Goswin von Brederlow , linux-raid@vger.kernel.org List-Id: linux-raid.ids --- On Mon, 25/1/10, Goswin von Brederlow wrote: > From: Goswin von Brederlow > Subject: Re: Fw: Why does one get mismatches? > To: Jon@eHardcastle.com > Cc: "Goswin von Brederlow" , linux-raid@vger.kerne= l.org > Date: Monday, 25 January, 2010, 10:37 > Jon Hardcastle > writes: >=20 > > Now the array is completely dismantled and I am > running bad blocks on the drives but I am on the last 2 of > the 7 drives and I still have no leads. No bad blocks, no > offline uncorrectable, no pending sectors no dmesg errors no > nothing. I have absolutely no leads what so ever. > > > > The only thing i have left to try is a full Mem test > and disconnect and reseat the additional sata controllers, > oh and buy 7 new sata cables incase 1 is bad. >=20 > The problem with badblocks is that it writes the same > pattern > everywhere. If the problem is that data gets read/written > to the wrong > block then that will not show up. >=20 > Try formating each drive and run fstest [1] on it. Or some > other test > that verifies data integrity using different patterns per > block. >=20 > MfG > =A0 =A0 =A0 =A0 Goswin >=20 > [1] http://mrvn.homeip.net/fstest/ >=20 This is going to be a time consuming process as i'll have to remove and= read from the array each drive 1 at a time then resync.=20 Thanks for the link, but could a similar result be achieved with the -w= option for badblocks? or perhaps a dd if=3D/dev/urandom? hmm scratch t= hat the urandom wont work as you need to read AND write. Just a worry as i clearly have mismatches and therefore corrupted data. =20 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html