Maguires on 5 Nov 2014 05:20:27 -0800

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Re: [PLUG] plug Digest, Vol 120, Issue 5

Re: Ripping a scratched DVD (Gavin W. Burris)

This may have already be touched on, I have had great luck on the recovery from invariable scratching of DVD and CD's over holidays by sons, daughters, nieces and nephews using Gavin's suggestion of ddrescue and a trick I keep on my bench that works almost every time. Don't laugh, I use "Nu Finish Scratch Doctor" it's made to fill scratches in automotive clear coat. If I can get the surface scratches to be transparent again, it makes the drive happy and the kids happy and I get to keep the magic Dad and Uncle mantle.

Lee Maguire

P.S. Michael I think that may be  "Panta rei descenditur" -Heraclitus

(As he died trying to cure himself from
Dropsy - fluid in the lower extremities, with cow manure;)

On Mon, Nov 3, 2014 at 3:00 PM, <> wrote:
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Today's Topics:

   1. Re: Ripping a scratched DVD (Gavin W. Burris)


Message: 1
Date: Mon, 3 Nov 2014 08:16:36 -0500
From: "Gavin W. Burris" <>
To: "Philadelphia Linux User's Group Discussion List"
Subject: Re: [PLUG] Ripping a scratched DVD
Message-ID: <">>
Content-Type: text/plain; charset="us-ascii"

You may find that dd will bomb out on the scratches.  I have recovered a
few disks that had scratches, including ones with intentionally
manufactured defects, with ddrescue.  ddrescue will do the same thing as
dd, but optionally pad unreadable sectors with zeros on the first pass,
and then go back to attempt a re-read.  I have had great success
recovering a few failing hard drives with it.

ddrescue -n -b 2048 /dev/sr0 disk.iso disk.log


On 11:34AM Sat 11/01/14 -0400, Michael Lazin wrote:
> If you are stuck using osx you can attempt a bit by bit copy with the "dd" command.  You'd have to look up the mac specific syntax.  You can run it in the terminal.   Applications,  utilities,  terminal.  You can make a mountable iso in this manner.
> On November 1, 2014 9:27:12 AM EDT, Amul Shah <> wrote:
> >Folks,
> >My niece scratched her copy of Frozen and all I have at my cousins
> >place is Windows and Mac OS X. I tried handbrake and disk utility (Mac
> >equivalent of gparted), but both failed out with i/o errors. Has anyone
> >ever done this?
> >
> >The fun thing about Linux is that I can just download it and live boot
> >it!
> >
> >Thanks
> >Amul
> >___________________________________________________________________________
> >Philadelphia Linux Users Group         --
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> Michael Lazin
> "Panta rei" -Heraclitus
> pub  2048R/3DDE2B52 2014-05-10 michael lazin <>
> sub  2048R/2BC1C2D3 2014-05-10
> ___________________________________________________________________________
> Philadelphia Linux Users Group         --
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Gavin W. Burris
Senior Project Leader for Research Computing
The Wharton School
University of Pennsylvania


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