zfs discuss - Sep 2010 - Cannot destroy snapshots: dataset does not exist

Hello,

I have a ZFS filesystem (zpool version 26 on Nexenta CP 3.01) which I''d
like to rollback but it''s having an existential crisis.

Here''s what I see:

root at bambi:/# zfs rollback bambi/faline/userdocs at AutoD-2010-09-28
cannot rollback to ''bambi/faline/userdocs at
AutoD-2010-09-28'': more recent snapshots exist
use ''-r'' to force deletion of the following snapshots:
bambi/faline/userdocs at AutoH-2010-09-28T2200
bambi/faline/userdocs at AutoH-2010-09-28T0300
<snip>

That looks right; ZFS sees that there are other snapshots newer than the
rollback snapshot. No problem, I''ll just run with -r:

root at bambi:/# zfs rollback -r bambi/faline/userdocs at AutoD-2010-09-28
cannot destroy ''bambi/faline/userdocs at
AutoH-2010-09-28T2200'': dataset does not exist
cannot destroy ''bambi/faline/userdocs at
AutoH-2010-09-28T0300'': dataset does not exist
<snip>

Any ideas how to work around this apparent bug?

Best,
Ian

Hi Ian,

If this is a release prior to b122, you might be running into CR 6860996.

Please see this thread for a possible resolution:

http://opensolaris.org/jive/thread.jspa?messageID=493866&#493866

Thanks,

Cindy

On 09/30/10 09:34, Ian Levesque wrote:
> Hello,
> 
> I have a ZFS filesystem (zpool version 26 on Nexenta CP 3.01) which
I''d like to rollback but it''s having an existential crisis.
> 
> Here''s what I see:
> 
> root at bambi:/# zfs rollback bambi/faline/userdocs at AutoD-2010-09-28
> cannot rollback to ''bambi/faline/userdocs at
AutoD-2010-09-28'': more recent snapshots exist
> use ''-r'' to force deletion of the following snapshots:
> bambi/faline/userdocs at AutoH-2010-09-28T2200
> bambi/faline/userdocs at AutoH-2010-09-28T0300
> <snip>
> 
> That looks right; ZFS sees that there are other snapshots newer than the
rollback snapshot. No problem, I''ll just run with -r:
> 
> root at bambi:/# zfs rollback -r bambi/faline/userdocs at AutoD-2010-09-28
> cannot destroy ''bambi/faline/userdocs at
AutoH-2010-09-28T2200'': dataset does not exist
> cannot destroy ''bambi/faline/userdocs at
AutoH-2010-09-28T0300'': dataset does not exist
> <snip>
> 
> Any ideas how to work around this apparent bug?
> 
> Best,
> Ian
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

Hi Cindy,

Thanks for your email; I noticed that link before sending this to the list.
Unfortunately, I''m running b134+ and there aren''t any clones
reported via zdb.

Ian

On Sep 30, 2010, at 12:33 PM, Cindy Swearingen wrote:
> If this is a release prior to b122, you might be running into CR 6860996.

On Thu, Sep 30, 2010 at 9:41 AM, Ian Levesque <ian at crystal.harvard.edu>
wrote:
> Thanks for your email; I noticed that link before sending this to the list.
Unfortunately, I''m running b134+ and there aren''t any clones
reported via zdb.
Are there holds on any of the snapshots that need to be removed? I
remember that giving strange messages.

You can check with ''zfs holds <snap_name>''.

-B

-- 
Brandon High : bhigh at freaks.com