Date: Wed, 09 Jul 2008 15:23:37 +0100 From: aslam_mohamed@wordbank.com To: Kris Kennaway <kris@FreeBSD.org> Cc: Dmitry Morozovsky <marck@rinet.ru>, current@FreeBSD.org Subject: Re: Thinking of using ZFS/FBSD for a backup system Message-ID: <4874C9E9.1050206@wordbank.com> In-Reply-To: <4874C38F.9040706@FreeBSD.org> References: <bd9320b30807072315x105cf058tf9f952f0f5bb2a6a@mail.gmail.com> <20080708100701.57031cda@twoflower.in.publishing.hu> <bd9320b30807080131j5e0e02a4y3231d7bfa1738517@mail.gmail.com> <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>
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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 <HDS728080PLA380 40Y9028LEN PF2OA65A> at ata2-master SATA150
ad8: 953869MB <Seagate ST31000340NS SN05> at ata4-master SATA150
ad10: 953869MB <Seagate ST31000340NS SN05> 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
>
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