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From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Anton Shterenlikht <mexas@bristol.ac.uk>
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Cc: freebsd-ia64@freebsd.org, Marcel Moolenaar <xcllnt@mac.com>,
	freebsd-questions@freebsd.org, freebsd-current@freebsd.org
Subject: Re: gmirror per partition. Was: Re: gmirror gm0 destroyed on
 shutdown; GPT corrupt
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>> It's better to use gmirror per partition.
>
> Like this?
>
> # gmirror label -vb round-robin root /dev/da0p2
> gmirror: Can't store metadata on /dev/da0p2: Operation not permitted.
isn't that partition accessed by other process or mounted?