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View Full Version : "Panic in DVD+rw Town" or "Dave Berry, Please Come Back!"



Fugg
06-11-2004, 10:21 AM
Ok guys, I had one of those moments last night.

I'm a big fan of "Dave's World" and have about 40 ep's on disk. Most are on dvd-r or -rw's. The pilot and the first 10 ep's are on a dvd+rw disk. A high-dollar Philips disk, at that.

The problem is with the +rw. Of course it's gotta be the ep's I'm most proud of, don't 'cha know. ...and this is the first time I've ever had a problem with files on a disk just becoming "corrupted".

I burnt this disk months ago and have played it since with no problems.

Now when I try to play a file (any file on the disk!!), windvd says the file is corrupted, mediaplayer says the format's unsupported and vlc just sits there grinding the cpu. Tytool just crashes. Tmpgenc won't open it. Mpeg2vcr just freezes with it.

They are the correct size and I can copy the files to the harddrive, they're just corrupted!

Is there any way to "fix" these buggers? These files mean alot to me and I would not mind spending some money to get them back. (if I had to buy some software package to do it or the like)

Can anyone help a desperate soul recover some un-replaceable vids?

I'm desperate here guys, just standing here with my hat in my hand hoping for a miracle.
;)




to the tune of "Beautiful Brown Eyes" ........ok,ok i'm old...

Beautiful, beautiful -r,
Beautiful, beautiful -r,
Beautiful, beautiful -r,
I'll never trust +r again.....

:)

alldeadhomiez
06-11-2004, 10:41 AM
Ok guys, I had one of those moments last night.

I'm a big fan of "Dave's World" and have about 40 ep's on disk. Most are on dvd-r or -rw's. The pilot and the first 10 ep's are on a dvd+rw disk. A high-dollar Philips disk, at that.

The problem is with the +rw. Of course it's gotta be the ep's I'm most proud of, don't 'cha know. ...and this is the first time I've ever had a problem with files on a disk just becoming "corrupted".

I burnt this disk months ago and have played it since with no problems.

Now when I try to play a file (any file on the disk!!), windvd says the file is corrupted, mediaplayer says the format's unsupported and vlc just sits there grinding the cpu. Tytool just crashes. Tmpgenc won't open it. Mpeg2vcr just freezes with it.

They are the correct size and I can copy the files to the harddrive, they're just corrupted!

Is there any way to "fix" these buggers? These files mean alot to me and I would not mind spending some money to get them back. (if I had to buy some software package to do it or the like)

Can anyone help a desperate soul recover some un-replaceable vids?

I'm desperate here guys, just standing here with my hat in my hand hoping for a miracle.

You'll need to describe the format the files were in, how exactly they differ from a known good file of the same format, and what you did to the DVD that caused the files to change. There is no generalized cure for bit rot..

Fugg
06-11-2004, 11:18 AM
You'll need to describe the format the files were in, ...
mpeg2, 8 files from a dtivo, 2 files from a sa/basic, tytool mux'd (480x480vbr and 352x480cbr)

how exactly they differ from a known good file of the same format, ...
I haven't opened them with a hex editor yet... I guess that's my next step?

and what you did to the DVD that caused the files to change. ...
That's the rub. It was in a jeweled case sitting in a box with 100 or so others. It played fine a few months ago, now nada. Min/max ambient temp ~65 to ~78 degrees, constant.

There is no generalized cure for bit rot..
Is my only hope to compare it with a good file of the same type, produced with the same version of tytool? ...in the hope that maybe it's just the initial header that's hosed?

I was wishing for a recovery tool, actually.
But, as grandpa said:
"Boy, if you wish in one hand and sh*t in the other, which one do you think will fill up first?"

Thanks for the reply and any clues on what to look for would be great!

alldeadhomiez
06-11-2004, 11:31 AM
I haven't opened them with a hex editor yet... I guess that's my next step?

Well, if you've looked for a recovery tool and couldn't find one, I'd say the best you can do is examine them by hand or hire a data recovery specialist.


That's the rub. It was in a jeweled case sitting in a box with 100 or so others. It played fine a few months ago, now nada. Min/max ambient temp ~65 to ~78 degrees, constant.

You should definitely be getting at least a few I/O errors if the media is to blame. Not all bit errors are (provably) detectable, but chances are very high that they will be caught, if not fixed, by the ECC.

Waruwaru
06-11-2004, 01:21 PM
Some of the cheap medias suffer the disk-rot, silver stuff flaking off, and/or you see blotches of dark spots on the bottom. I lost some disks this way. But your disks are only a few month old, so that shouldn't be an issue...

FredThompson
06-11-2004, 09:28 PM
...and you've tried the disc in other drives/players? Drives DO go bad.

Fugg
06-11-2004, 10:26 PM
...and you've tried the disc in other drives/players? Drives DO go bad.
Yep.
A sony 530a, a dd0401, a generic reader and now an a04.

Pr.Sinister
06-13-2004, 01:10 PM
You should really try copying the data off the disc with a recover tool and
not the crappy Windows I/O...

You can try with IsoBuster in Non-Windows mode but my best bet is
CD/DVD Inspector by ArrowKey... It has saved quite a few CD's for me in
the past. Haven't tried it on DVD's yet but it has impressed me with CD's
so i don't see why it wouldn't work just as well on DVD's.

There is a cheaper version called CD/DVD Diagnostics ($50) and it comes
with a money back guarantee if you don't get your data back.

I don't know how you feel about this ethically but i know for a fact
that both are available on Shareaza.

-Pr.

EDIT: ArrowKey is now merged with InfinaDyne. So if you want to see
the official specs and prices, go to http://www.infinadyne.com

kkmike
06-16-2004, 03:18 PM
Did you write to the disk track at once/disk at once (finalized), or were the files added session at a time, or drag n drop/drive letter access?
I've had a lot of problems with files becoming corrupt on RW's without finalizing the disc. Especially using drag n drop. They would work fine and then one day, probably because of whatever the last session added, the disc is corrupt. There's just so much storage space on a DVD that incrementally adding data doesn't work well.

321 Studios makes a recovery program DVD Rescue - but I don't know if it was designed for anything other than movie DVD's. Maybe take a look anyway.

Fugg
06-16-2004, 03:48 PM
DAO, finalized.

I always do 'em that way. I've burnt literally 100's of disks and this is the first one that has done this.

btw, the few dvd+rw's I've burnt have been backed up to -rw's.

Better safe than sorry, right?
;)