I use DVD shrink, though sometimes I encounter cyclic redundancy errors, and I have to redo the entire contents of the disc, and even then I might still get a cyclic redundancy error the second time, and it could drag on for hours without any final result. Is there a program where I can choose select portions of the disc for redoing so I can just redo the part where the error occurs, instead of having to delete it all to begin afresh?
CRC errors are caused by dirty disks, or problematic movies. If it is a problematic movie, then use DVD Decrypter and rip to hardrive first, and then Shrink.
DVD Shrink encountered and error and can not continue
Failed to read file "(Device)\" Data error (cyclic redundancy check)
Possible cause:
The DVD you are trying to backup may be dirty, physically damaged (scratches) or badly authored.
The problem can be due to known "Problematic movies" such as Resident Evil: Apocalypse region 2,4,5. For more information on a list of those movies and a working solution look at this FAQ page.
Possible fixes:
Try cleaning the disc - toothpaste is a very good thing to use.
Try using DVD Decrypter to first rip the disc to your hard-drive, and then use DVD Shrink "Open Files". Here is a guide on how to use DVD Decrypter. It's important that you use the "File" mode - and from the "Edit" dropdown menu, select "All Files" (NOT "movie files").
Try using your DVD writer to read the disc.
Try any combination of the above.
Go back to your shop and exchange it.
Make sure you are using DVD Decrypter ver 3.5.4.0. Earlier versions needed a PSL file to decrypt DVDs with the new copy protection.
How to clean the disc with toothpaste:
Yep, just put a small dob directly onto the scratch, use the traditional white variety not the clear gell type. I then use a soft tissue wipe gently in only a radial direction (a straight line between the hub and the rim). Since the data is arranged circularly on the disc, the micro scratches you create when cleaning the disc (or the nasty gouge you make with the dirt you didn't see on your cleaning cloth) will cross more error correction blocks and be less likely to cause unrecoverable errors.
If you continue to have problems after cleaning the disc, you may need to attempt to repair one or more scratches. Sometimes even hairline scratches can cause errors if they just happen to cover an entire error correction (ECC) block. Examine the disc to find scratches, keeping in mind that the laser reads from the bottom.
There are essentially two methods of repairing scratches:
Fill or coat the scratch with an optical material.
Polish down the scratch.
There are many commercial products that do one or both of these, or you may wish to do it yourself with polishing compounds or toothpaste. The trick is to polish out the scratch without causing new ones. A mess of small polishing scratches may cause more damage than a big scratch. As with cleaning, polish only in the radial direction.
