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Date:      Fri, 17 Sep 2010 23:05:36 +0400
From:      "Marat N.Afanasyev" <amarat@ksu.ru>
To:        Michael Sperber <sperber@deinprogramm.de>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: How to predict drive number change for 7.3->8.1 upgrade?
Message-ID:  <4C93BC00.3050707@ksu.ru>
In-Reply-To: <y9laang77zr.fsf@deinprogramm.de>
References:  <201009171238.o8HCcwCl084727@lurza.secnetix.de>	<y9lr5gs7cjh.fsf@deinprogramm.de> <4C93674B.20300@ksu.ru>	<y9liq247asc.fsf@deinprogramm.de> <4C937933.4060707@ksu.ru> <y9laang77zr.fsf@deinprogramm.de>

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Michael Sperber wrote:
> "Marat N.Afanasyev"<amarat@ksu.ru>  writes:
>
>> you may try the following commands:
>>
>> sysctl kern.geom.debugflags=3D16
>>
>> foreach fs (your-filesystems)
>> glabel label your-$fs-label your-$fs-device
>> end
>>
>> echo geom_label_load=3D"YES">>  /boot/loader.conf
>> reboot
>>
>> and see if the labels appear in /dev/label
>
> Is this safe to do?  The man page for glabel seems to imply that glabel=

> should be used before newfs, and tunefs after newfs.
>
probably safe, but I didn't try this. there's another option: you may=20
consider to create gmirror device that allows you to shoot two ducks=20
with one arrow: 1) make your system fail-safe 2) all your devices will=20
be in form /dev/mirror/devXsYl regardless of underlying adX-s. to do=20
this all you need is a second hard drive large enough to serve as copy=20
of your boot drive

--=20
SY, Marat


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