ZFS promote failure

Pawel Jakub Dawidek pjd at FreeBSD.org
Wed May 25 14:53:12 UTC 2011

On Wed, May 11, 2011 at 11:50:51AM -0400, Dave Cundiff wrote:
> Hello,
> I'm seeing a strange problem trying to use zfs promote.
> [root at san2]# zfs snapshot san/sr at snap
> [root at san2]# zfs clone san/sr at snap san/sr5
> [root at san2]# zfs promote san/sr5
> cannot promote 'san/sr5': dataset is busy
> Being a freshly created dataset I'm not sure how it would be busy. Are
> there any caveats to using zfs promote on zvols? The snapshots are of
> ext3 formatted zvols. I don't really need to promote them but wanted
> to in case I needed to destroy the source for some reason.

Which FreeBSD version is this? I just tried it on 9-CURRENT with ZFSv28
and it works just fine, even if I've file systems mounted on top of
those ZVOLs.

Pawel Jakub Dawidek                       http://www.wheelsystems.com
FreeBSD committer                         http://www.FreeBSD.org
Am I Evil? Yes, I Am!                     http://yomoli.com
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