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Re: [Bug-ddrescue] ddrescue outfile

From: Zeniff Martineau
Subject: Re: [Bug-ddrescue] ddrescue outfile
Date: Thu, 1 Sep 2016 09:56:55 -0700

Oops, I didn't realize this didn't go to the mailing list. Here:

I think Photorec usually comes with Testdisk, so maybe it wasn't
mentioned specifically? (See https://en.wikipedia.org/wiki/Photorec or
https://en.wikipedia.org/wiki/List_of_data_recovery_software )
And, as far as I understand it, I think ddrescue is often used before
other recovery software because it tries to get "all" data from a
physically damaged drive/cd (which might become worse after each read)
to make a drive/cd image (so as not to keep messing with the damaged
source) and then Photorec or other software can search that image for
stuff to recover as files, etc.

I don't have much experience with CDs, but I'm very glad to hear that
it worked out! :)

Antonio is the one to thank for the great solutions, though~;)

On 8/29/16, Ron DnRcomp <address@hidden> wrote:
> Thank you for your quick response. Somehow, I could not see mention of
> Photorec on any articles I read.
> Everything worked out great. I did not attempt any more than the basic
> recovery because one scratch on the CD had completely removed the foil. The
> family was very pleased and quite grateful for the results. They decided 347
> photos was heaven enough.
> So very impressed with all the Linux features I have ignored over the years.
> And you also managed to get a couple new Linux supporters in the deal.
> {thumbs up}
> Thanks again,
> Ron
> ----- Original Message -----
> From: "Zeniff Martineau" <address@hidden>
> To: <address@hidden>; <address@hidden>
> Sent: Friday, August 26, 2016 10:14 AM
> Subject: Re: [Bug-ddrescue] ddrescue outfile
>> In some situations, I think it might be possible to recover a little
>> more data from a CD/DVD with "dvdisaster" than with ddrescue. Maybe
>> you could try that? I think this post is an example:
>>  http://lists.gnu.org/archive/html/bug-ddrescue/2016-03/msg00000.html
>> If it were me, I'd also suggest for you or the family to keep both the
>> CD and cdimage file(s) made just in case different combinations of
>> options for "photorec" (or other software) reveal more files or better
>> intact files later.. or even in case newer versions of recovery
>> programs are able to recover more in the future.
>> I hope that helps~
>> On Fri, Aug 26, 2016 at 6:41 AM, Paul Daniels <address@hidden>
>> wrote:
>>> Use photorec to now pull photos out of the data.
>>>    # photorec cdimage
>>> It'll ask where you want to put the data etc, and it'll dump all the
>>> files
>>> it can find based on signature searching.
>>> On 26/08/16 16:49, address@hidden wrote:
>>>> Sorry to contact you this way. But I have racked my brain trying
>>>> desperately to imitate that I am as intelligent as you guys and I am
>>>> totally out of energy.
>>>> I used ddrescue 1.19 to rescue a badly scratched CD containing photos of
>>>> a
>>>> soldier who died recently. The family asked if I could retrieve images
>>>> from a damaged CD. I would be really excited to tell them I recovered
>>>> the
>>>> photos using ddrescue on Linux Mint 18. The command was (as per your
>>>> manual's example):
>>>> --------------------------------------------------
>>>> ddrescue -n -b2048 /dev/cdrom cdimage mapfile
>>>> --------------------------------------------------
>>>> Now, I am totally blown away as to the next step. First, I don't know if
>>>> I
>>>> have anything to offer them. Here are the results:
>>>> --------------------------------------------------
>>>> rescued:   320307 kB,  errsize:  18354 kB,  errors:     279
>>>> Current status
>>>> rescued:   322701 kB,  errsize:  15960 kB,  current rate:        0 B/s
>>>>     ipos:   338659 kB,   errors:     273,    average rate:     1251 B/s
>>>>     opos:   338659 kB, run time:   31.88 m,  successful read:      13 s
>>>> ago
>>>> Finished
>>>> ---------------------------------------------------
>>>> Second, I have searched for hours to figure out what to do with
>>>> "cdimage".
>>>> I have the file on my hard drive. But nobody seems to be able to tell
>>>> me
>>>> in stupid language how to turn "cdimage" into a photo CD.
>>>> Please help. I am at the end of my rope.
>>>> Thanks in advance,
>>>> Ron Asselstine
>>>> D 'n R Computer Services
>>>> P.S.   I am not charging these people anything to do this. They have
>>>> already paid a tremendous personal amount.

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