zfs discuss - Aug 2009 - cannot import ''tank'': pool is formatted using a newer ZFS version

I was using OpenSolaris 2009.06 on an IDE drive, and decided to reinstall onto a
mirror (smaller SSDs).

My data pool was a separate pool and before reinstalling onto the new SSDs I
exported the data pool.

After rebooting and installing OpenSolaris 2009.06 onto the first SSD I tried to
import my data pool and saw the following message:

# zpool import tank
cannot import ''tank'': pool is formatted using a newer ZFS
version

I then used Package Manager to do an "update all" to bring the OS upto
the latest version, and so hopefully also the ZFS version, then I retried the
import with the same result -- i.e. it won''t import.

Here''s some additional info:
SunOS zfsnas 5.11 snv_111b i86pc i386 i86pc Solaris

# zpool upgrade -v
This system is currently running ZFS pool version 14.

The following versions are supported:

VER  DESCRIPTION
---  --------------------------------------------------------
 1   Initial ZFS version
 2   Ditto blocks (replicated metadata)
 3   Hot spares and double parity RAID-Z
 4   zpool history
 5   Compression using the gzip algorithm
 6   bootfs pool property
 7   Separate intent log devices
 8   Delegated administration
 9   refquota and refreservation properties
 10  Cache devices
 11  Improved scrub performance
 12  Snapshot properties
 13  snapused property
 14  passthrough-x aclinherit support
For more information on a particular version, including supported releases, see:

http://www.opensolaris.org/os/community/zfs/version/N

Where ''N'' is the version number.

If the OS is at ZFS version 14, which I assume is the latest version, then my
data pool presumably can''t be using a newer version.

So is there a bug, workaround or simple solution to this problem?

If I could query the ZFS version of the unimported data pool that would be
handy, but I suspect this is a bug anyway...

Here''s hoping for a quick reply as right now, I cannot access my data
:(((

Cheers,
Simon

http://breden.org.uk/2008/03/02/a-home-fileserver-using-zfs/
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Some more info that might help:

I have the old IDE boot drive which I can reconnect if I get no help with this
problem. I just hope it will allow me to import the data pool, as this is not
guaranteed.

Way back, I was using SXCE and the pool was upgraded to the latest ZFS version
at the time.
Then around May 2009 I installed "OpenSolaris 2009.06 preview", which
appeared a couple of weeks before the release of the final OpenSolaris 2009.06.
I used Package Manager to update all packages etc. At some point I ran
"zpool upgrade" on the data pool to bring it up to the latest ZFS
version, as it was saying that it was not using the latest ZFS version when I
did a "zpool status" on the pool.
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Looks like my last IDE-based boot environment may have been pointing to the /dev
package repository, so that might explain how the data pool version got ahead of
the official 2009.06 one.

Will try to fix the problem by pointing the SSD-based BE towards the dev repo
and see if I get success.

Will update this thread with my findings, although I expect it will work :)
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Yes, setting the Boot Environment repository URL to
http://pkg.opensolaris.org/dev/ worked.

My pool had been upgraded to ZFS version 16 previously using the dev repo.
''zpool get all tank'' shows the ZFS version. But you
can''t use this command unless the pool is imported, so when you
encounter problems like I did, you can''t see which version the
pool''s using.
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BTW, if you''re interested in seeing my attempts to migrate from a 160
GB IDE drive-based root boot pool to a pair of mirrored 30 GB SSDs, then take a
look here:

http://breden.org.uk/2009/08/29/home-fileserver-mirrored-ssd-zfs-root-boot/
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