Re: Trashed Disk Labels
Date: Sat, 30 Nov 2002 17:43:53 +1100 (EST)
From: Bruce Evans <[EMAIL PROTECTED]>
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To: Kirk McKusick <[EMAIL PROTECTED]>
cc: [EMAIL PROTECTED]
Subject: Re: Trashed Disk Labels
In-Reply-To: <[EMAIL PROTECTED]>
X-ASK-Info: Whitelist match
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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Re: Trashed Disk Labels
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 To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Trashed Disk Labels
Date: Fri, 29 Nov 2002 14:53:06 -0500 (EST)
From: Wesley Morgan <[EMAIL PROTECTED]>
To: Kirk McKusick <[EMAIL PROTECTED]>
cc: [EMAIL PROTECTED]
Subject: Re: Trashed Disk Labels
X-ASK-Info: Confirmed by User
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.
>
> Kirk McKusick
Great! Any tools available to extract my var/db/pkg dirs from this image
of my trashed UFS2 filesystem? :>
What seems to work is to boot from CD-ROM, use
disklabel -r -w auto
to reinstall the default disklabel, then
disklabel -B
to put back the bootstrap. At that point your existing filesystems
should all come back. This of course assumes that you used the
orginal default partition sizes. If not, you will need to
figure them out and edit up an appropriate disk label.
Kirk McKusick
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Re: Trashed Disk Labels
On Fri, 29 Nov 2002 14:53:06 -0500 (EST) Wesley Morgan <[EMAIL PROTECTED]> wrote: > 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. > > > > Kirk McKusick > > Great! Any tools available to extract my var/db/pkg dirs from this image > of my trashed UFS2 filesystem? :> > > -- > Hi! I'm a .signature virus! Copy me into your ~/.signature to help me > spread! > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-current" in the body of the message I successfully used ffsfind utility to locate filesystem boundaries on a disk I trashed some time ago. I do not have the utility source available anymore, but you can track it down quite easily on google, I believe. The one I used was actually posted for NetBSD, but it compiled with minimal changes on FreeBSD and Solaris too. You will have to teach it to recognize UFS2 magic. -- Alexander Kabaev To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: Trashed Disk Labels
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. > > Kirk McKusick Great! Any tools available to extract my var/db/pkg dirs from this image of my trashed UFS2 filesystem? :> -- Hi! I'm a .signature virus! Copy me into your ~/.signature to help me spread! To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
