Date: Fri, 21 May 2004 13:56:07 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: jason-dusek@uiowa.edu Cc: "Questions@BSD" <freebsd-questions@freebsd.org> Subject: Re: Broken Disk Message-ID: <20040521125607.GH31695@happy-idiot-talk.infracaninophile.co.uk> In-Reply-To: <40ADF7BB.8050403@cs.uiowa.edu> References: <40ADF7BB.8050403@cs.uiowa.edu>
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On Fri, May 21, 2004 at 07:36:11AM -0500, Jason Dusek wrote:
> I am trying to put a new disk on my system. I read the description of=20
> the process in FreeBSD Unleashed and apparently I misunderstood it,=20
> because I ended up installing a boot manager on the new disk. Now I can=
=20
> not mount it - I get error messages like:
Presence of absence of a boot manager on the drive should make any
difference at all once the system is up and running.
=20
> # mount /dev/ad1e /mnt/backup
> operation not permitted
/dev/ad1e is a very odd device name to be using. As far as I remember
that's a backwards compatability thing from changes that were made
somewhere around the FreeBSD-3.x timeframe. You probably want
/dev/ad1s1e
=20
> How do I 'start over'? I have tried to add this disk many times with=20
> /stand/sysinstall. Eventually I gave up and went to the command line=20
> utilities as outlined in the handbook. The error I got was interesting,=
=20
> but I have no idea what it means:
>=20
> # fdisk -BI ad1
> ******* Working on device /dev/ad1 *******
> fdisk: invalid fdisk partition table found
You're going about this the right way, but you've run into a disk with
a label so scrambled it's confusing fdisk(8). Old hacky trick is to
zero out the first few blocks of the drive, so that fdisk(8) thinks
the disk is completely virgin:
# dd if=3D/dev/zero of=3D/dev/ad1 bs=3D512 count=3D10
Note that this will completely trash anything already on the drive.
Then use fdisk(8), disklabel(8)/bsdlabel(8), newfs(8) to create
filesystems.
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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