From owner-freebsd-questions@FreeBSD.ORG  Mon Jul 18 11:37:06 2005
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From: Nick Barnes <Nick.Barnes@pobox.com>
To: Alex Zbyslaw <xfb52@dial.pipex.com>
In-Reply-To: <42D84DA3.3000304@dial.pipex.com> 
	from Alex Zbyslaw <xfb52@dial.pipex.com> 
	of "Sat, 16 Jul 2005 00:58:27 +0100"
Date: Mon, 18 Jul 2005 12:37:02 +0100
Message-ID: <60857.1121686622@thrush.ravenbrook.com>
Sender: nb@ravenbrook.com
Cc: freebsd-questions@freebsd.org
Subject: Re: better disk reliability on a desktop machine 
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At 2005-07-15 23:58:27+0000, Alex Zbyslaw writes:
> Nick Barnes wrote:
> 
> >Here are my previous questions on the related subject, some 4 years
> >ago now:
> >
> ><http://docs.freebsd.org/cgi/getmsg.cgi?fetch=872461+0+archive/2001/freebsd-questions/20010617.freebsd-questions>
> >  
> >
> Shame no-one answered your badsect question.  Did you ever figure it out?

No.  I hope to have enough time to code this up myself this time.
It's a Small Matter of Programming to grovel over the filesystem to
figure out what a particular sector does.

I'm a little disappointed that fsdb doesn't do this.  Maybe I should
start by hacking on fsdb.

I have recently discovered the "conv=noerror,sync" option to dd.  In
combination with a background shell script which repeatedly runs
"atacontrol mode 0 udma6 udma6", this lets me recover all the readable
bits from a broken filesystem quite fast.

Nick B