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List:       zfs-discuss
Subject:    Re: [zfs-discuss] dataset is busy when doing snapshot
From:       Anil Jangity <anilj () me ! com>
Date:       2012-05-20 13:31:22
Message-ID: 6CD7E528-EF18-4F13-BE32-99938623AB76 () me ! com
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Yup, that's exactly what I did last night...

zoned=off
mountpoint=/some/place
mount
unmount
mountpoint=legacy
zoned=on

Thanks!

On May 20, 2012, at 3:09 AM, Jim Klimov wrote:

> 2012-05-20 8:18, Anil Jangity wrote:
>> What causes these messages?
>> 
>> cannot create snapshot 'zones/rani/ROOT/zbe-2@migration': dataset is busy
>> 
>> ...This is on a very old OS now snv_134b… I am working to upgrade them soon!
>> There are zones living in zones pool, but none of the zones are running or mounted.
> 
> I've had such problems a few times on snv_117 and/or older,
> blocking recursive snapshots and the zfs-auto-snap service,
> and liveupgrade (OpenSolaris SXCE) among other things, but
> I thought they were fixed in later releases before the last
> ones like yours.
> 
> Essentially the workaround was to mount the "offending"
> dataset and unmount it again if it is not needed now -
> this clears some internal ZFS flags and allows snapshots
> to proceed. This could be tricky with "zoned=on" datasets
> and to an extent those with a legacy mountpoint, but
> those problems can be worked around (i.e. disable "zoned",
> mount, umount, reenable "zoned").
> 
> Hope this helps,
> //Jim Klimov
> 
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