illumos gate

I am trying to import in OI b151 a single-drive data zpool that was created in S11X, explicitly at version 28.
However, it fails.
Rebooting in S11X, the pool still works as expected.
The drive is a regular 512B sector drive, created with the regular zpool command.

Please note that it was an S11X on /support, so it had received updates.

1. zpool upgrade
   This system is currently running ZFS pool version 28.

All pools are formatted using this version.

Listing the importable pools shows some weirdness:

1. zpool import
   pool: wenjun_data
   id: 10664418497025954710
   state: UNAVAIL
   status: The pool was last accessed by another system.
   action: The pool cannot be imported due to damaged devices or data.
   see: http://www.sun.com/msg/ZFS-8000-EY
   config:

   wenjun_data UNAVAIL insufficient replicas
   c3t1d0 UNAVAIL corrupted data

Trying to import it doesn't work:

1. zpool import -f wenjun_data
   cannot import 'wenjun_data': invalid vdev configuration

Output of zdb -l

$ sudo zdb l /dev/dsk/c3t1d0
Password:
-------------------------------------------
LABEL 0
--------------------------------------------
failed to unpack label 0
--------------------------------------------
LABEL 1
--------------------------------------------
failed to unpack label 1
--------------------------------------------
LABEL 2
--------------------------------------------
failed to unpack label 2
--------------------------------------------
LABEL 3
--------------------------------------------
failed to unpack label 3