Partition seems to have been zero:ed. For no reason.

Partition seems to have been zero:ed. For no reason.

[Johan Stenehall]

After a kernal upgrade My UUIDs in /etc/fstab stoped working so I changed
them to /dev/sd* When rebooting again /dev/sdb2 didn't want to mount. I
tried to manualy mount it without success and tried to run a xfs_repair on
it. Got the following: http://pastebin.com/m44d3aa47
After that the partition still didn't want to mount. Had to overwrite the
inprogress flag "xfs_db> write inprogress 0", That aloud me to mount the
partition but it looked entirly empty.

A very nice person, <sandeen_> (thank you), on xfs@freenode tried to help
me. However it seems like the entire disk, or part of it, have been zero:ed.

Does anyone know if it's possible to recover from this? And if so how?

Running Linux Ubuntu, 8.04 32-bit
uname -r
2.6.24-21-generic
xfs_repair -V
xfs_repair version 2.9.4

Hope this information is sufficent. Thanks in advance for any answers

// Johan (please forgive my english)


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Re: Partition seems to have been zero:ed. For no reason.

[Dave Chinner]

On Tue, Oct 21, 2008 at 08:11:50PM +0200, Johan Stenehall wrote:
> After a kernal upgrade My UUIDs in /etc/fstab stoped working so I changed
> them to /dev/sd* When rebooting again /dev/sdb2 didn't want to mount. I
> tried to manualy mount it without success and tried to run a xfs_repair on
> it. Got the following: http://pastebin.com/m44d3aa47

Are you using LVM or MD? i.e. did a volume get re-assembled
incorrectly and hence the XFS tools saw random fragments of a
filesystem?

> After that the partition still didn't want to mount. Had to overwrite the
> inprogress flag "xfs_db> write inprogress 0", That aloud me to mount the
> partition but it looked entirly empty.
> 
> A very nice person, <sandeen_> (thank you), on xfs@freenode tried to help
> me. However it seems like the entire disk, or part of it, have been zero:ed.
> 
> Does anyone know if it's possible to recover from this? And if so how?

Recovery is possible - it's called restoring from backups. You do have a
backup, don't you?

> Running Linux Ubuntu, 8.04 32-bit
> uname -r
> 2.6.24-21-generic
> xfs_repair -V
> xfs_repair version 2.9.4

Hmmmmm - haven't we have these symptoms reported by a couple of
Ubuntu users now? There's been a few ppl reporting such problems
of late....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

Re: Partition seems to have been zero:ed. For no reason.

[Johan Stenehall]

No LVM and since I don't know what MD are I guess not. It was a plain
parition created with mkfs.xfs and fdisk.
And no, no backups of the current partition, don't have enough diskspace
anywere do to a hd backup and dvd's take to long time to burn. But nothing
that importent was destroyed, it'l just take time to flac the cds again :).

The same problem with UUID's stoping to work happend a year ago when
upgrading kernal, so that is nothing new with ubuntu. That time I didn't
lose any information.

Thanks for the replay!

// Johan


2008/10/21 Dave Chinner <david@fromorbit.com>

> On Tue, Oct 21, 2008 at 08:11:50PM +0200, Johan Stenehall wrote:
> > After a kernal upgrade My UUIDs in /etc/fstab stoped working so I changed
> > them to /dev/sd* When rebooting again /dev/sdb2 didn't want to mount. I
> > tried to manualy mount it without success and tried to run a xfs_repair
> on
> > it. Got the following: http://pastebin.com/m44d3aa47
>
> Are you using LVM or MD? i.e. did a volume get re-assembled
> incorrectly and hence the XFS tools saw random fragments of a
> filesystem?
>
> > After that the partition still didn't want to mount. Had to overwrite the
> > inprogress flag "xfs_db> write inprogress 0", That aloud me to mount the
> > partition but it looked entirly empty.
> >
> > A very nice person, <sandeen_> (thank you), on xfs@freenode tried to
> help
> > me. However it seems like the entire disk, or part of it, have been
> zero:ed.
> >
> > Does anyone know if it's possible to recover from this? And if so how?
>
> Recovery is possible - it's called restoring from backups. You do have a
> backup, don't you?
>
> > Running Linux Ubuntu, 8.04 32-bit
> > uname -r
> > 2.6.24-21-generic
> > xfs_repair -V
> > xfs_repair version 2.9.4
>
> Hmmmmm - haven't we have these symptoms reported by a couple of
> Ubuntu users now? There's been a few ppl reporting such problems
> of late....
>
> Cheers,
>
> Dave.
> --
> Dave Chinner
> david@fromorbit.com
>


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