From owner-freebsd-questions@FreeBSD.ORG  Fri Oct 29 19:49:40 2010
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To: Chuck Swiger <cswiger@mac.com>
From: "Julian H. Stacey" <jhs@berklix.com>
Organization: http://www.berklix.com BSD Unix Linux Consultancy, Munich Germany
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In-reply-to: Your message "Fri, 29 Oct 2010 11:04:15 PDT."
	<3CA64AA4-0063-4207-8E72-4EB9396B5F50@mac.com> 
Date: Fri, 29 Oct 2010 21:49:16 +0200
Sender: jhs@berklix.com
Cc: freebsd general questions <freebsd-questions@freebsd.org>,
	"Jason C. Wells" <jcw@speakeasy.net>
Subject: Re: Recovering a DVD 
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Hi,
Reference:
> From:		Chuck Swiger <cswiger@mac.com> 
> Date:		Fri, 29 Oct 2010 11:04:15 -0700 
> Message-id:	<3CA64AA4-0063-4207-8E72-4EB9396B5F50@mac.com> 

Chuck Swiger wrote:
> On Oct 29, 2010, at 10:54 AM, Jason C. Wells wrote:
> > I have a back up DVD that I cannot mount.  dd won't read /dev/acd0  with an error "dd: /dev/acd0: Input/output error".    Tried dvdisaster but it can't find my drive. Any pointers you can offer in getting this data off this disc are greatly appreciated.
> 
> Try adding "bs=2048" or "bs=32768" to your dd line...?  Also, what does "atacontrol list" say about your DVD drive?
> 

/usr/ports/sysutils/vobcopy 

useful on audio video content,  dont know about `normal' data.

Cheers,
Julian
-- 
Julian Stacey: BSD Unix Linux C Sys Eng Consultants Munich http://berklix.com
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