FreeBSD 9.2-p9/FreeBSD 9.3-PRERELEASE zpool import/export problem

[FF]

Thank you so much for a technical answer! I looked at the 9.3-RELEASE notes
for any new features in ZFS and didn't see any listed, so I had assumed no
new ones were implemented.

I'm curious why creating a zpool under releng-9.2 didn't solve the problem
after the fact? I even ran a complete drive wipe (dd if=/dev/zero
of=/dev/{ada0-ada44} bs=16m) and the problem persisted.

Thanks!


On Fri, Jun 27, 2014 at 2:08 AM, Trond Endrestøl <
Trond.Endrestol at fagskolen.gjovik.no> wrote:

> On Thu, 26 Jun 2014 21:28-0400, FF wrote:
>
> > So I'm having a weird problem that just came up when I went from
> > freebsd-updated binaries to svn'ing the releng and/or stable source
> trees.
> >
> > When I compile and build a kernel (only), I can create a zpool
> >
> > something like:
> >
> > zpool create tank ada1
> >
> > I can use it, list it, create files on it, etc.
> >
> > I can zpool export it.
> >
> > It will still show as online an importable.
> >
> > But when I try to reimport it (no reboot or anything):
> >
> > root at 1:/root # zpool create -f storage2 ada40
> > root at 1:/root # df -kh
> > Filesystem       Size    Used   Avail Capacity  Mounted on
> > /dev/ada45s1a    7.9G    6.3G    990M    87%    /
> > devfs            1.0k    1.0k      0B   100%    /dev
> > storage2         913G     31k    913G     0%    /storage2
> > root at 1:/root # zpool export storage2
> > root at 1:/root # zpool import
> >    pool: storage2
> >      id: 10010508457819787577
> >   state: ONLINE
> >  action: The pool can be imported using its name or numeric identifier.
> >  config:
> >
> >         storage2    ONLINE
> >           ada40     ONLINE
> >
> >
> > root at 1:/root # zpool import storage2
> > cannot import 'storage2': pool is formatted using a newer ZFS version
> >
> > This happens repeatably whether its multi drive or single drive.
> >
> > root at 1:/root # zfs upgrade
> > This system is currently running ZFS filesystem version 5.
> >
> > All filesystems are formatted with the current version.
> >
> >
> > root at 1:/root # ls -al /sbin/z*
> > -r-xr-xr-x  1 root  wheel  96968 Feb 12  2013 /sbin/zfs
> > -r-xr-xr-x  1 root  wheel  92472 Feb 12  2013 /sbin/zpool
> > root at 1:/root # md5 /sbin/zfs
> > MD5 (/sbin/zfs) = 76ddf1a93f9a045466ead1ef465859d0
> > root at 1:/root # md5 /sbin/zpool
> > MD5 (/sbin/zpool) = 29ec8f28ad5c6023ece4bb4eccb49f1e
> >
> > There's obviously no data on the system, so reformatting it with
> > 9.2-RELEASE should fix it, but I'm trying to run a custom kernel and I'm
> > trying to figure out what I've screwed up along the way. Also, zpool
> import
> > -f does not solve it, same error.
> >
> > Any suggestions/advice on where this may have gone sideways?
>
> It's likely that your zpool created by stable/9 has enabled (and
> activated some of) the following features:
>
> feature at multi_vdev_crash_dump
> feature at spacemap_histogram
> feature at enabled_txg
> feature at hole_birth
> feature at extensible_dataset
> feature at bookmarks
> feature at filesystem_limits
>
> They are unsupported by releng/9.2. Sadly, once a feature has been
> enabled there's no going back.
>
> Either continue using stable/9, or when creating a zpool you intend
> to use on older ZFS systems, try to avoid enabling any features
> during pool creation, i.e. zpool create -d ... Afterwards you may
> enable the features you know is supported across the board.
>
> Maybe someone else knows a better way.
>
>
> --
> +-------------------------------+------------------------------------+
> | Vennlig hilsen,               | Best regards,                      |
> | Trond Endrestøl,              | Trond Endrestøl,                   |
> | IT-ansvarlig,                 | System administrator,              |
> | Fagskolen Innlandet,          | Gjøvik Technical College, Norway,  |
> | tlf. mob.   952 62 567,       | Cellular...: +47 952 62 567,       |
> | sentralbord 61 14 54 00.      | Switchboard: +47 61 14 54 00.      |
> +-------------------------------+------------------------------------+




-- 
FF