DVD data recovery

[boran]

Hi, My friend who lives in the US (I live in Belgium) sent me 16 DVD's with data on, however they came loose in the spindle and were quite mistreated during transport.

Most files transfer correctly, but about 3700 MB of files have some corruption (windows gives a CRC error during copy) now this is not such a big deal, because 3700 MB is doable over the internet (65GB was not).

But I'd like to keep the unnecceseary traffic to a minimum, of those 370 MB only 50% (approx) is actually damaged, so i'd like to find a way to get all readable data off my DVD's and all unreadable data over the web (which would save thus 50% internet traffic)

most DVD/CD data recovery programs I tried so far replace unrecoverable sectors with dud data which is not what I can use, I already tought of FTP, but the corruption is not neatly placed at the end of the file, and FTP doesnt support small transfer blocks.

any help would be greatly appreciated.

Boran.

 

[tynopik]

1) par2 is your friend

[or]

2) mail another dvd

 

[boran]

another DVD mailing would cost too much for what it is and might end up damaged too (it's around half the world, that is a little distance
would that par2 also work with massive corruption ? (50% in one end, up to 70% even)

but after revising the error rates I think this topic can be closed.
only a few files are partially corrupted, most of the files are 100% unreadable.

 

[tynopik]

par2 will work with whatever is available, down to a single block

however if >75% of a file is corrupt, it would probably be easier to simply resend the entire thing

 

[Cerb]

1. Have him use media next time that is not CMC or Longten. TY would be good, Riteks are OK (and cheap).
2. Have him send them packed tightly and not on a spindle. Paper sleeves would be fine.. In a small box, packed with tissue paper, newspaper or bubble wrap.
3. Use the power of the internet and be done with it...

 

[tiap]

You have to elaborate a little more on the damage to the dvd's. I assume they are scratched. Are these scratches on the top or on the bottom (clear plastic side)?
If they are scratches and on the bottom; here is what to do.
Take very fine wet sandpaper 1000 grit.
Sand out the scratches.
Use a auto paint buffer, first with course rubbing compound, then medium compound and then go to a lighter glazing compound.
The dvd will get warm but don't worry.
If you can't do this, take it to a auto body paint shop and ask them to do it.
Then wash it with soap and water, dry it and use it.
I had a baby that destroyed a bunch of my dvd's and this repaired all of them.

 

[boran]

Originally posted by: Cerb
1. Have him use media next time that is not CMC or Longten. TY would be good, Riteks are OK (and cheap).
2. Have him send them packed tightly and not on a spindle. Paper sleeves would be fine.. In a small box, packed with tissue paper, newspaper or bubble wrap.
3. Use the power of the internet and be done with it...

well, appearently he was kind of scammed, he bought a 100spindle tayo yuden, but appearently the bastards had mixed some CMC magnetics dics in them.

out of the 16 DVD's 3 are CMC magnetics, and all those three are about 25% damaged (about 1 of the 4 GB of data is lost) there is only one Tayo Yuden disc with bad files, and those are also the least damaged, imho that's still quite a feat, the centre hub is cracked, there are a lot of deep scratches which go along with the data tracks (I think it has been spinning during transport in the spindle and some sand must have gotten between it)

If he werent scammed into some CMC magnetics I think those two files would have been the only lost ones, because that disc is the only one with visible defects. every other disc is still badly damaged (methinks freezing, humidity etc did that) but those can be red to my HD.

anyways, the only way to recover will be trough the internet -sigh-

remember folks, always use tayo yuden, they're the best, and imho this has proven this again.
And dont let you get CMC discs sold as tayo yuden.