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Date: Tue, 26 Nov 2013 23:57:59 -0500
From: Kurt Lidl <lidl@pix.net>
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To: freebsd-stable@freebsd.org
Subject: Re: FreeBSD 10-BETA3 - zfs clone of zvol snapshot is not created
References: <klgmmtyeaujlwrhwpost@wvbm>
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> Hi,
>
> am I doing something wrong, ZFS does not support that or there is a bug that zvol clone does not show up under /dev/zvol after creating it from other zvol snapshot?
>
> # zfs list -t all | grep local
> local                                     136G  76.8G   144K  none
> local/home                                117G  76.8G   117G  /home
> local/vm                                 18.4G  76.8G   144K  none
> local/vm/vbox_pcbsd_10                   5.35G  76.8G  5.35G  -
> local/vm/vbox_windows_7                  10.8G  76.8G  9.86G  -
> local/vm/vbox_windows_7 at clean             940M      -  8.12G  -
> local/vm/vbox_windows_xp                 2.27G  76.8G  2.16G  -
> local/vm/vbox_windows_xp at clean            109M      -  1.07G  -
>
> # zfs clone local/vm/vbox_windows_7 at clean local/vm/vbox_windows_7_personal
>
> # zfs list -t all | grep local
> local                                     136G  76.8G   144K  none
> local/home                                117G  76.8G   117G  /home
> local/vm                                 18.4G  76.8G   144K  none
> local/vm/vbox_pcbsd_10                   5.35G  76.8G  5.35G  -
> local/vm/vbox_windows_7                  10.8G  76.8G  9.86G  -
> local/vm/vbox_windows_7 at clean             940M      -  8.12G  -
> local/vm/vbox_windows_7_personal            8K  76.8G  8.12G  -
> local/vm/vbox_windows_xp                 2.27G  76.8G  2.16G  -
> local/vm/vbox_windows_xp at clean            109M      -  1.07G  -

Does it show up after a reboot?

If so, it's probably this bug:

http://www.freebsd.org/cgi/query-pr.cgi?pr=178999

Still not fixed.  Sigh.

-Kurt