From owner-freebsd-current  Fri Nov 29 23: 0:36 2002
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To: Bruce Evans <bde@zeta.org.au>
Subject: Re: Trashed Disk Labels 
Cc: current@FreeBSD.ORG, Poul-Henning Kamp <phk@critter.freebsd.dk>
In-Reply-To: Your message of "Sat, 30 Nov 2002 17:43:53 +1100."
             <20021130174229.L3363-100000@gamplex.bde.org> 
Date: Fri, 29 Nov 2002 23:00:31 -0800
From: Kirk McKusick <mckusick@beastie.mckusick.com>
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	Date: Sat, 30 Nov 2002 17:43:53 +1100 (EST)
	From: Bruce Evans <bde@zeta.org.au>
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	To: Kirk McKusick <mckusick@McKusick.COM>
	cc: current@FreeBSD.ORG
	Subject: Re: Trashed Disk Labels
	In-Reply-To: <200211291938.gATJcS59077381@beastie.mckusick.com>
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	On Fri, 29 Nov 2002, Kirk McKusick wrote:

	> I have had a report of a disk label getting trashed after booting
	> up to a kernel with the new UFS2 superblock format. I have just
	> checked in an update to ufs/ffs/ffs_vfsops.c (version 1.198) that
	> explicitly checks to make sure that it will not trash your disk
	> label. I highly recommend that you update to this version, even if
	> you are only running with UFS1 filesystems.

	Labels should be write protected, but this seems to have been broken
	by GEOM.

	Bruce

Disk labels certainly used to be write protected. Not sure when that
stopped, but it certainly would have been useful in this recent context.

	Kirk McKusick

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