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Date:      Wed, 09 Jul 2008 12:59:56 +0200
From:      Miroslav Lachman <000.fbsd@quip.cz>
To:        matheus@eternamente.info
Cc:        freebsd-stable@freebsd.org
Subject:   Re: disk questions: geom and zfs
Message-ID:  <48749A2C.4070805@quip.cz>
In-Reply-To: <2c7aa7cb6f8acbc18993b802bb3a5016.squirrel@cygnus>
References:  <2c7aa7cb6f8acbc18993b802bb3a5016.squirrel@cygnus>

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matheus@eternamente.info wrote:
> hail,
> 
> I have a 7-stable:
> 
> [matheus@xxx /usr/home/matheus]$ uname -a
> FreeBSD xxx 7.0-STABLE FreeBSD 7.0-STABLE #2: Sun Jul  6 15:03:26 BRT 2008
>     root@lamneth:/usr/obj/usr/src/sys/xxx_7  i386
> 
> and there exists three geom things.
> 
> gconcat status
>           Name  Status  Components
> concat/concat0      UP  ad4
>                         ad5
> gmirror status
>           Name    Status  Components
> mirror/mirror0  COMPLETE  ad8s1
>                           ad10s1
> gstripe status
>           Name  Status  Components
> stripe/stripe0      UP  ad8s2
>                         ad10s2
> 
> and a small (100GB) zfs pool.
> 
> the thing is, if I take all these disks to a 6.3R-p2 system, will I get in
> trouble ? what if this 6.3R becomes 7-stable also, will this trouble
> disappear ?

There is incompatible change in gmirror metadata format and 6.x will not 
recognize gmirrors created or even booted with 7.x kernel.

Miroslav Lachman



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