can't import - zpool has unsupported features

[dvwiz]

My zpool was created on a Freenas 9.2 system, and I'm trying to import it on my Ubuntu 12.04 system.

It seems that the zfs version on the importing system doesn't support the feature com.delphix:spacemap_histogram.

I tried installing everything in the ZoL PPA as well as ubuntu-zfs, but the result of zpool import is still the same:

$ sudo zpool import
   pool: VAULT
     id: 615913674916999xxxx
  state: UNAVAIL
status: The pool can only be accessed in read-only mode on this system. It
    cannot be accessed in read-write mode because it uses the following
    feature(s) not supported on this system:
    com.delphix:spacemap_histogram
action: The pool cannot be imported in read-write mode. Import the pool with
    "-o readonly=on", access the pool on a system that supports the
    required feature(s), or recreate the pool from backup.
 config:

    VAULT                                UNAVAIL  unsupported feature(s)
      mirror-0                           ONLINE
        ata-ST4000VN000-1H4168_Z300xxxx  ONLINE
        ata-ST4000VN000-1H4168_Z300xxxx  ONLINE

So, is this import-able? Thanks for everything, by the way :-)

[DeHackEd]

Like it said, you can import it read-only because the spacemap_histogram feature allows it.
zpool import VAULT -o readonly=on

Alternatively you will need to wait for the spacemap_historgram feature to get added to ZFS On Linux. This isn't likely to happen until 0.6.4 is released.

[dvwiz]

Thanks for the info.

If my zpool is a mirror consisting of 2 disks, is there a way to import readonly and create a new, writable zpool with the contents?

I understand that my question is outside the scope of this issue - I'm just asking if you can give me some advice out of the kindness of your heart.

[aarcane]

If my zpool is a mirror consisting of 2 disks, is there a way to import
readonly and create a new, writable zpool with the contents?

You can always remove one copy, create a new pool on that disk, then use
zfs send to forge a new copy, but if either disk dies, you're to have a bad
day. Be sure to scrub first.

I understand that my question is outside the scope of this issue - I'm
just asking if you can give me some advice out of the kindness of your
heart.

All the advice we give is out of the kindness of our hearts.

[dvwiz]

Beautiful. Thanks all!