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Date: Mon, 13 Jul 2009 15:00:03 +0200
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From: Oliver Pinter <oliver.pntr@gmail.com>
To: stable@freebsd.org
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Subject: ZFS, unionfs - Operation not supported
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Hi all!

It is the problematic FS:
zpower on /mnt/zpower (zfs, local)
/usr/src on /mnt/zpower/jail/default/ports (nullfs, local)

and the failed command:
mount_unionfs -o below /mnt/zpower/jail/default/ports/
/mnt/zpower/jail/www/usr/ports/

(truss mount_unionfs -o below /mnt/zpower/jail/default/ports/
/mnt/zpower/jail/www/usr/ports/ ) > & /tmp/unionfs.log

Have I any chance, to unionmount ZFS with UFS or ZFS not supported
this operations?

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