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Date:      Mon, 8 Mar 2010 12:52:43 +0200
From:      Eugene Dzhurinsky <bofh@redwerk.com>
To:        freebsd-current@freebsd.org
Subject:   Re: A tool for remapping bad sectors in CURRENT?
Message-ID:  <20100308105243.GA31468@office.redwerk.com>
In-Reply-To: <4B94D1FC.1050407@FreeBSD.org>
References:  <mailpost.1268044056.2992919.61277.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw> <4B94D1FC.1050407@FreeBSD.org>

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On Mon, Mar 08, 2010 at 12:31:24PM +0200, Alexander Motin wrote:
> You may try to overwrite these sectors with dd. It should trigger sector
> reallocation. To be sure, you may read them before and after the write.

dd if=3D/dev/ad4 of=3D/dev/null skip=3D222342559 bs=3D512 count=3D1
dd: /dev/ad4: Input/output error
0+0 records in
0+0 records out
0 bytes transferred in 2.351940 secs (0 bytes/sec)

dd if=3D/dev/zero of=3D/dev/ad4 seek=3D222342559 bs=3D512 count=3D1
dd: /dev/ad4: Operation not permitted

Should I do it in single mode?

--=20
Eugene N Dzhurinsky

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