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Date:      Fri, 27 Jun 2014 08:08:00 +0200 (CEST)
From:      =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no>
To:        FF <fusionfoto@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: FreeBSD 9.2-p9/FreeBSD 9.3-PRERELEASE zpool import/export problem
Message-ID:  <alpine.BSF.2.11.1406270757110.11883@mail.fig.ol.no>
In-Reply-To: <CAD=tpefnp-epRYySiuHPKuZdPdvhJMZvdOiaU_3QqbcUnnM8Rg@mail.gmail.com>
References:  <CAD=tpefnp-epRYySiuHPKuZdPdvhJMZvdOiaU_3QqbcUnnM8Rg@mail.gmail.com>

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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@1:/root # zpool create -f storage2 ada40
> root@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@1:/root # zpool export storage2
> root@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@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@1:/root # zfs upgrade
> This system is currently running ZFS filesystem version 5.
> 
> All filesystems are formatted with the current version.
> 
> 
> root@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@1:/root # md5 /sbin/zfs
> MD5 (/sbin/zfs) = 76ddf1a93f9a045466ead1ef465859d0
> root@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@multi_vdev_crash_dump
feature@spacemap_histogram
feature@enabled_txg
feature@hole_birth
feature@extensible_dataset
feature@bookmarks
feature@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.


-- 
+-------------------------------+------------------------------------+
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| Trond Endrestøl,              | Trond Endrestøl,                   |
| IT-ansvarlig,                 | System administrator,              |
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From owner-freebsd-questions@FreeBSD.ORG  Fri Jun 27 07:19:54 2014
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Date: Fri, 27 Jun 2014 14:19:49 +0700
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To: freebsd-questions@freebsd.org
Subject: Re: hating bsd : stranger than fiction ...
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Mayuresh Kathe wrote:
> 
> been looking through various sites for information about enhancing
> freebsd security, and dang, i land on;
> http://aboutthebsds.wordpress.com/

If what he wrote about BHyVe is true (that it can only run FreeBSD
guests), I don't understand what this thing is for. We already have
jails, and I have successfully run even ancient versions of FreeBSD
in jails (by adding a.out support to the kernel).

Please tell me he lied.

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov@sibptus.tomsk.ru



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