Identify and Skip Bad Section?

[Crunk]

I have a few DVDs that have scratches on them and result in a cyclic redundancy error when attempting to backup. I have been able to find the bad file using Nero. The file is one of the main files and I opened the IFO in VobBlanker and it contains 37 cells. Is there anyway I can identify what part of the file is the damaged part and the one I need to blank out? Thanks.

[guns1inger]

What are you trying to achieve ? If you blank out the whole cell, chances are you will lose a large chunk of the video, making it unwatchable.

I would try the following first

1. Toothpaste (white only) carefully rubbed into the scratches. This does two things - it fills the scratches, allowing the laser to read better, and is mildly abrasive so helps polish the scratches.

2. Brasso - search for it in the forums, as someone had a good method using this stuff.

3. Use ISOBuster to read the disks. It can do a better job of recovery than most.

[Crunk]

Thanks for the reply. The cells are actually only a few minutes long each, so I was hoping I would be able to find the bad one.

I have tried toothpaste a number of times on different discs, but am not sure if I'm doing it right. I usually wash the disc off after applying. I know that might defeat the purpose, but I'm afraid I might damage the drive if I left some toothpaste on there. Maybe I'm applying too much? Can you describe how it should be done?

I've also tried ISOBuster, but when there's a lot of bad sectors, it takes a long time to finish, but that's not my main problem. The drive stops and starts every few seconds, which is not something that I would like it to do for many hours. This does work however.

I'll take a look at Brasso.

[iooi]

Apply a pea size bit of toothpaste to disk and rub from the center out and edge to center... Never round and round. Yep, you have to rinse it off afterwards and dry the disk.....
Could be you are using the wrong type of toothpaste as not all are the same. You need one that feels gritty when you are rubbing it in for best results.
Also watch you dont catch your disk with your nails when rubbing as that puts major groves in the surface....
Never had any luck with brasso, seems just that bit too abrasaive...

[blinky88]

Open DVD Decrypter>settings>i/o tab>change re-try to read bad sectors to 0 and then check "ignore read errors". also select "ISO" write.

The write time will depend on the amount of errors on the disc, that said, you will be able to burn the ISO file created. Then use DVD Decrypter to burn that file.

[Crunk]

Thanks iooi, I'll continue trying that. I did have one disc that was able to improve by a few sectors :P .

blinky88, I did have those settings selected, but it seems that if the scratch is bad enough, it will still stop and start and make the drive sound like it's falling apart. I think those discs need some kind of miracle fix.