From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michal Piotrowski" Subject: Re: Software raid0 will crash the file-system, when each disk is 5TB Date: Wed, 16 May 2007 01:29:59 +0200 Message-ID: <6bffcb0e0705151629j78920ca2r9337dccdfc1bb6a9@mail.gmail.com> References: <659F626D666070439A4A5965CD6EBF406836C6@gazelle.ad.endace.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <659F626D666070439A4A5965CD6EBF406836C6@gazelle.ad.endace.com> Content-Disposition: inline Sender: linux-fsdevel-owner@vger.kernel.org To: Jeff Zheng Cc: Ingo Molnar , Neil Brown , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org List-Id: linux-raid.ids [Ingo, Neil, linux-raid added to CC] On 16/05/07, Jeff Zheng wrote: > Hi everyone: > > We are experiencing problems with software raid0, with very > large disk arrays. > We are using two 3ware disk array controllers, each of them is connected > 8 750GB harddrives. And we build a software raid0 on top of that. The > total capacity is 5.5TB+5.5TB=11TB > > We use jfs as the file-system, we have a test application that write > data continuously to the disks. After writing 52 10GB files, jfs > crashed. And we are not able to recover it, fsck doesn't recognise it > anymore. > We then tried xfs, same application, lasted a little longer, but gives > kernel crash later. > > We then reconfigured the hardware array, this time we configured two > disk array from each controller, than we have 4 disk arrays, each of > them have 4 750GB harddrives. Than build a new software raid0 on top of > that. Total capacity is still the same, but 2.75T+2.75T+2.75T+2.75T=11T. > > This time we managed to fill the whole 11T data without problem, we are > still doing validation on all 11TB of data written to the disks. > > It happened on 2.6.20 and 2.6.13. > > So I think the problem is in the way on software raid handling very > large disk, maybe a integer overflow or something. I've searched on the > web, only find another guy complaining the same thing on the xfs mailing > list. > > Anybody have a clue? > > > Jeff > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > Regards, Michal -- Michal K. K. Piotrowski Kernel Monkeys (http://kernel.wikidot.com/start)