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Date:      Mon, 16 Apr 2001 18:03:24 -0500
From:      Mike Meyer <mwm@mired.org>
To:        Thomas David Rivers <rivers@dignus.com>
Cc:        questions@freebsd.org
Subject:   Re: 4.2-Release & bad IDE blocks...
Message-ID:  <15067.31292.118757.73035@guru.mired.org>
In-Reply-To: <85532652@toto.iv>

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Thomas David Rivers <rivers@dignus.com> types:
> My 4.2-release system suddenly crashed with bad blocks on the
> ATA drive....
> 
> Fsck simply indicates it can't read 3 blocks - but, as I understand
> it - bad block mapping is now "gone"... (the assumption being that
> any reasonable ATA/IDE drive isn't going to have this problem.)
> 
> So - I'd like to at least get the file system mounted so I can
> recover what is recoverable... but, fsck will never succeed to
> mark the file mountable... (I could simply force the mount, but
> that would likely result in a crash again... stifling my recovery
> efforts.)
> 
> If anyone has pointers to how to go about this - I'd appreciate it!

Read the man page for mount, looking for the "force" option. Be warned
that mounting a bad file system can cause your kernel to crash.

The safer alternative - if you have the disk space - is to use dd to
copy the file system (conv=noerror,sync) to a file, use vn to access
it as a disk, then fsck and mount that.

	<mike
--
Mike Meyer <mwm@mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

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