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DVD salvage utility

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  DVD salvage utility "Jonathan N. Little" <lws4art@gmail.com> - 2016-01-07 09:29 -0500
    Re: DVD salvage utility DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2016-01-07 09:37 -0500
      Re: DVD salvage utility JEDIDIAH <jedi@nomad.mishnet> - 2016-01-07 10:26 -0600
        Re: DVD salvage utility "Jonathan N. Little" <lws4art@gmail.com> - 2016-01-07 12:29 -0500
    Re: DVD salvage utility Wildman <best_lay@yahoo.com> - 2016-01-07 12:17 -0600
      Re: DVD salvage utility Chris Ahlstrom <OFeem1987@teleworm.us> - 2016-01-07 16:59 -0500
        Re: DVD salvage utility Wildman <best_lay@yahoo.com> - 2016-01-07 16:11 -0600
    Re: DVD salvage utility Mark Warner <mhwarner.inhibitions@gmail.com> - 2016-01-07 21:12 -0500
      Re: DVD salvage utility "E. Robinson" <E.Robinson@merck.com> - 2016-01-09 18:26 +0000
        Re: DVD salvage utility "Jonathan N. Little" <lws4art@gmail.com> - 2016-01-10 10:19 -0500
          Re: DVD salvage utility Paul <nospam@needed.com> - 2016-01-10 13:48 -0500

#185849 — DVD salvage utility

I have some damaged data dvds where they are partially readable that I 
want to savage what still readable. I am looking for a app/script to 
copy what is good and skip the damaged automatically. DVDisaster is 
great utility to recover minor damaged disks and to create ECC protected 
volumes, but tries & retries to recover damage areas such that this one 
disk has been running for more that 24-hours. What I am looking for is 
something to just quickly copy what is good and skip anything damaged, 
because we are talking about thousands of files manually doing is 
impractical. Any ideas?

-- 
Take care,

Jonathan
-------------------
LITTLE WORKS STUDIO
http://www.LittleWorksStudio.com

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#185850

On Thu, 7 Jan 2016 09:29:53 -0500, "Jonathan N. Little"
<lws4art@gmail.com> Gave us:

>I have some damaged data dvds where they are partially readable that I 
>want to savage what still readable. I am looking for a app/script to 
>copy what is good and skip the damaged automatically. DVDisaster is 
>great utility to recover minor damaged disks and to create ECC protected 
>volumes, but tries & retries to recover damage areas such that this one 
>disk has been running for more that 24-hours. What I am looking for is 
>something to just quickly copy what is good and skip anything damaged, 
>because we are talking about thousands of files manually doing is 
>impractical. Any ideas?

  If the source is available for any such utility, you could find and
edit the retry count to speed up the reject-and-move-on process.

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#185858

On 2016-01-07, DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> wrote:
> On Thu, 7 Jan 2016 09:29:53 -0500, "Jonathan N. Little"
><lws4art@gmail.com> Gave us:
>
>>I have some damaged data dvds where they are partially readable that I 
>>want to savage what still readable. I am looking for a app/script to 
>>copy what is good and skip the damaged automatically. DVDisaster is 
>>great utility to recover minor damaged disks and to create ECC protected 
>>volumes, but tries & retries to recover damage areas such that this one 
>>disk has been running for more that 24-hours. What I am looking for is 
>>something to just quickly copy what is good and skip anything damaged, 
>>because we are talking about thousands of files manually doing is 
>>impractical. Any ideas?
>
>   If the source is available for any such utility, you could find and
> edit the retry count to speed up the reject-and-move-on process.

   Doesn't dd already do this? I know I have pulled data off of damaged
consumer DVDs before and managed to work around the broken bits. I just
don't recall if I used any special tools at the time. Well, I wouldn't
have used anything more specail than dd.

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#185862

JEDIDIAH wrote:
> On 2016-01-07, DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> wrote:
>> On Thu, 7 Jan 2016 09:29:53 -0500, "Jonathan N. Little"
>> <lws4art@gmail.com> Gave us:
>>
>>> I have some damaged data dvds where they are partially readable that I
>>> want to savage what still readable. I am looking for a app/script to
>>> copy what is good and skip the damaged automatically. DVDisaster is
>>> great utility to recover minor damaged disks and to create ECC protected
>>> volumes, but tries & retries to recover damage areas such that this one
>>> disk has been running for more that 24-hours. What I am looking for is
>>> something to just quickly copy what is good and skip anything damaged,
>>> because we are talking about thousands of files manually doing is
>>> impractical. Any ideas?
>>
>>    If the source is available for any such utility, you could find and
>> edit the retry count to speed up the reject-and-move-on process.
>
>     Doesn't dd already do this? I know I have pulled data off of damaged
> consumer DVDs before and managed to work around the broken bits. I just
> don't recall if I used any special tools at the time. Well, I wouldn't
> have used anything more specail than dd.
>

 From what I am reading on the subject most of the issue is in the 
firmware of the DVD drive which tries UMPTEEN retries before giving up 
and moving on.

This one DVD shows the first 2GB okay but fails in the latter part is 
trashed with the nice DVDisaster graphic. At the rate it is now going it 
will take about a week for the copy iso to generate! I just want to copy 
the approximate 2GB "good" part. Still it is thousands of files in 
multiple subdirs. Windows would not even recognize any data on the disk! 
As far as Windows was concern it was blank media. At least in Linux I 
can a access it, and open  and copy some files, but to do in manually 
would be outrageously tedious.

-- 
Take care,

Jonathan
-------------------
LITTLE WORKS STUDIO
http://www.LittleWorksStudio.com

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#185865

On Thu, 07 Jan 2016 09:29:53 -0500, Jonathan N. Little wrote:

> I have some damaged data dvds where they are partially readable that I 
> want to savage what still readable. I am looking for a app/script to 
> copy what is good and skip the damaged automatically. DVDisaster is 
> great utility to recover minor damaged disks and to create ECC protected 
> volumes, but tries & retries to recover damage areas such that this one 
> disk has been running for more that 24-hours. What I am looking for is 
> something to just quickly copy what is good and skip anything damaged, 
> because we are talking about thousands of files manually doing is 
> impractical. Any ideas?

testdisk
safecopy
ddrescue

-- 
<Wildman> GNU/Linux user #557453
The cow died so I don't need your bull!

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#185877

Wildman wrote this copyrighted missive and expects royalties:

> On Thu, 07 Jan 2016 09:29:53 -0500, Jonathan N. Little wrote:
>
>> I have some damaged data dvds where they are partially readable that I 
>> want to savage what still readable. I am looking for a app/script to 
>> copy what is good and skip the damaged automatically. DVDisaster is 
>> great utility to recover minor damaged disks and to create ECC protected 
>> volumes, but tries & retries to recover damage areas such that this one 
>> disk has been running for more that 24-hours. What I am looking for is 
>> something to just quickly copy what is good and skip anything damaged, 
>> because we are talking about thousands of files manually doing is 
>> impractical. Any ideas?
>
> testdisk
> safecopy
> ddrescue

That last one also has some frontends, gddrescue and ddrescueview.

-- 
For years a secret shame destroyed my peace--
I'd not read Eliot, Auden or MacNiece.
But now I think a thought that brings me hope:
Neither had Chaucer, Shakespeare, Milton, Pope.
		-- Justin Richardson.

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#185879

On Thu, 07 Jan 2016 16:59:12 -0500, Chris Ahlstrom wrote:

> Wildman wrote this copyrighted missive and expects royalties:
> 
>> On Thu, 07 Jan 2016 09:29:53 -0500, Jonathan N. Little wrote:
>>
>>> I have some damaged data dvds where they are partially readable that I 
>>> want to savage what still readable. I am looking for a app/script to 
>>> copy what is good and skip the damaged automatically. DVDisaster is 
>>> great utility to recover minor damaged disks and to create ECC protected 
>>> volumes, but tries & retries to recover damage areas such that this one 
>>> disk has been running for more that 24-hours. What I am looking for is 
>>> something to just quickly copy what is good and skip anything damaged, 
>>> because we are talking about thousands of files manually doing is 
>>> impractical. Any ideas?
>>
>> testdisk
>> safecopy
>> ddrescue
> 
> That last one also has some frontends, gddrescue and ddrescueview.

Didn't know that.  Thanks.

-- 
<Wildman> GNU/Linux user #557453
The cow died so I don't need your bull!

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#185888

On 01/07/2016 09:29 AM, Jonathan N. Little wrote:
> I have some damaged data dvds where they are partially readable that I
> want to savage what still readable. I am looking for a app/script to
> copy what is good and skip the damaged automatically. DVDisaster is
> great utility to recover minor damaged disks and to create ECC protected
> volumes, but tries & retries to recover damage areas such that this one
> disk has been running for more that 24-hours. What I am looking for is
> something to just quickly copy what is good and skip anything damaged,
> because we are talking about thousands of files manually doing is
> impractical. Any ideas?
>

Photorec perhaps? (Does a lot more than photos.)

http://www.cgsecurity.org/wiki/PhotoRec

-- 
Mark Warner
MEPIS Linux
Registered Linux User #415318
...lose .inhibitions when replying

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#185936

On Thu, 07 Jan 2016 21:12:31 -0500, Mark Warner wrote:

> Photorec perhaps? (Does a lot more than photos.)

Does "dd" work?

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#185996

E. Robinson wrote:
> On Thu, 07 Jan 2016 21:12:31 -0500, Mark Warner wrote:
>
>> Photorec perhaps? (Does a lot more than photos.)
>
> Does "dd" work?
>

Well the DVDisaster ran for almost 2 days and then threw an some error, 
damn I did not write it down, but the drive would not work after a 
reboot. Even after rebooting too into Win10. I figured I trashed the 
drive, so I pulled it to get the part no. When I reinstalled it is 
worked <shrug>. Maybe crashed the drive itself and being de-powered 
"rebooted" is? I am a little reluctant to try it again...

What I wanted was not to try in recover the whole disk, it is obviously 
really damaged. Not scratched but something must be amiss in the 
recording layer. I just want to recover only the undamaged files and 
have it skip immediately to the next file upon an error. It is the 
rereading in attempt to recover the bad sectors that is problem making 
the process extremely long and potentially damaging for the hardware.

-- 
Take care,

Jonathan
-------------------
LITTLE WORKS STUDIO
http://www.LittleWorksStudio.com

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#186006

Jonathan N. Little wrote:
> E. Robinson wrote:
>> On Thu, 07 Jan 2016 21:12:31 -0500, Mark Warner wrote:
>>
>>> Photorec perhaps? (Does a lot more than photos.)
>>
>> Does "dd" work?
>>
> 
> Well the DVDisaster ran for almost 2 days and then threw an some error, 
> damn I did not write it down, but the drive would not work after a 
> reboot. Even after rebooting too into Win10. I figured I trashed the 
> drive, so I pulled it to get the part no. When I reinstalled it is 
> worked <shrug>. Maybe crashed the drive itself and being de-powered 
> "rebooted" is? I am a little reluctant to try it again...
> 
> What I wanted was not to try in recover the whole disk, it is obviously 
> really damaged. Not scratched but something must be amiss in the 
> recording layer. I just want to recover only the undamaged files and 
> have it skip immediately to the next file upon an error. It is the 
> rereading in attempt to recover the bad sectors that is problem making 
> the process extremely long and potentially damaging for the hardware.
> 

If this was a SATA optical drive, the problem is that SATA
doesn't have a robust reset procedure.

If you look at the old IDE cable, one of the wires on there
is RESET. If the drive is "insane", a simple reboot is enough
to fix it, because part of the process involved creating a
reset pulse at T=0 of the reboot cycle.

The thin data cable on SATA, has no room for a reset signal.
And it appears they didn't use an inband signaling technique
to fake it.

So when a SATA device becomes non-communicative, you're
supposed to cycle power and try again. Power off at the
back of the computer, and see if the device is detectable
over SATA after that.

I've had that happen a couple times with hard drives.
And doing a complete power cycle brings them back.
The root cause in that case, was too many Molex extender
cables inside the PC casing, before power gets to the
hard drive. In your case, the chipset inside the optical
drive was probably crashed (it has its own processor),
and without a RESET signal to jog it back to reality,
a full power cycle helps.

If SATA had been invented where I worked, it wouldn't
have made it into production. For failing this basic
feature (guaranteed resettable). I didn't know this is
how SATA works in practice, until my hard drive disappeared
and wouldn't come back. And it came back after the power
was cycled.

    Paul

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