From owner-freebsd-current@FreeBSD.ORG Wed Jul 9 14:23:39 2008 Return-Path: Delivered-To: current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BA482106567F; Wed, 9 Jul 2008 14:23:39 +0000 (UTC) (envelope-from aslam_mohamed@wordbank.com) Received: from mail.wordbank.com (mail.wordbank.com [213.86.82.65]) by mx1.freebsd.org (Postfix) with ESMTP id 4CF588FC1F; Wed, 9 Jul 2008 14:23:39 +0000 (UTC) (envelope-from aslam_mohamed@wordbank.com) Received: from mail.wordbank.com (mail.wordbank.com [10.1.1.10]) by spammy.wordbank.com (Postfix) with ESMTP id 6FD085C005; Wed, 9 Jul 2008 15:23:38 +0100 (BST) Received: from 10.1.1.115 by mail.wordbank.com ([10.1.1.10] running VPOP3) with ESMTP; Wed, 9 Jul 2008 15:20:52 +0100 Message-ID: <4874C9E9.1050206@wordbank.com> Date: Wed, 09 Jul 2008 15:23:37 +0100 From: aslam_mohamed@wordbank.com Organization: Wordbank User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: Kris Kennaway References: <20080708100701.57031cda@twoflower.in.publishing.hu> <4873C4FA.2020004@FreeBSD.org> <20080709062533.J58331@woozle.rinet.ru> <48749087.4070802@FreeBSD.org> <20080709145010.Q58331@woozle.rinet.ru> <48749EA7.40702@FreeBSD.org> <20080709152739.Q58331@woozle.rinet.ru> <4874A453.7060406@FreeBSD.org> <4874A981.7080106@wordbank.com> <4874B58B.7000108@FreeBSD.org> <4874BEFF.20202@wordbank.com> <4874C38F.9040706@FreeBSD.org> In-Reply-To: <4874C38F.9040706@FreeBSD.org> X-Server: VPOP3 V1.5.4 - Registered Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Dmitry Morozovsky , current@FreeBSD.org Subject: Re: Thinking of using ZFS/FBSD for a backup system X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jul 2008 14:23:39 -0000 Something interesting, I just slot couple of 1TB SATA in to the same FreeBSD machine and re-created the zfs pool (this is just to make sure that without firewire the ZFS can work well in FeeBSD) . When I reboot the machine I see the following appears on booting... This is the same thing appeared before with Firewire!! ad4: 76324MB at ata2-master SATA150 ad8: 953869MB at ata4-master SATA150 ad10: 953869MB at ata5-master SATA150 **GEOM: ad8: corrupt or invalid GPT detected.** **GEOM: ad8: GPT rejected -- may not be recoverable.** **GEOM: ad10: corrupt or invalid GPT detected.** **GEOM: ad10: GPT rejected -- may not be recoverable.** SMP: AP CPU #1 Launched! Trying to mount root from ufs:/dev/ad4s1a WARNING: ZFS is considered to be an experimental feature in FreeBSD. ZFS filesystem version 6 ZFS storage pool version 6 Now I am running Rsync to backup all the file servers and it had done up to 1TB without complaining.. Currently, the Zpool status looks pretty OK.. pool: backup state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM backup ONLINE 0 0 0 ad8 ONLINE 0 0 0 ad10 ONLINE 0 0 0 errors: No known data errors I don't know in the future there will be any issue because of this Geom messages... is there any known problem like zfs/geom/gpt incompatibility?.. is it the ZFS causing this error(!) messages?..any thoughts?... Thanks Kris Kennaway wrote: > aslam_mohamed@wordbank.com wrote: >> Thanks for your reply. I did get some weired messages like ' vdev >> failure' just two days before the ZFS pool disappeared, but I don't >> know whether this is from ZFS or another GEOM issue. I shut the >> machine down and restarted everything back and got it to do the sync >> again. Later I noticed zpool status was showing some big numbers like >> (83, 90 ...) on checksum column. I did the zpool clear and it cleared >> the numbers. Then I think couple days later the sync process stopped >> in the middle. When I investigated it, I found that zpool status is >> not there. I think the firewire/FreeBSD could be a potential >> contributor to this problem. Now I am trying to recover the backup >> data (if there is any in external disks!!) by connecting the external >> disks to SUN Solaris and getting the SUN/ZFS to see the pool!!!.. I >> cant think of any other ways to recover the backup!!!.. > > It probably should have set off alarms for you when you first started > seeing checksum failures. That indicates a serious problem! At this > point, it sounds like your data might be highly corrupted, and > unfortunately, perhaps too corrupted to recover. > > Kris >