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Subject: Re: ZFS bug or feature
From: Thomas Hoffmann <trh411@gmail.com>
To: Andrey Fesenko <f0andrey@gmail.com>, Tom Evans <tevans.uk@googlemail.com>, 
 freebsd-current <freebsd-current@freebsd.org>
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In /boot/loader.conf:
kern.geom.label.disk_ident.enable=0

will disable the use of disk ids.

-Tom