Dead Disk Doctor – allows copying files from scratched or damaged CD, DVD disks, unreadable Floppy and Hard Drives or other media. It replaces lost data with random bytes reading files by expandable blocks. Friendly interface. Only three steps and done! For example, one of your favorite DVD movies is scratched and the DVD player stopping and skipping during you watch the movie. You can solve it using Dead Disk Doctor, to copy files from damaged disk on to Hard Drive or to make a copy with corrected movie or music album.
Most of the time the copying algorithm allows to read data when standard utilities or devices cannot. But even if some part of the media is completely unreadable, it will be replaced with random data. As result, watching this way copied movie, may be you will see some video artifacts for the less then a second, which is much better the stops and skips. Quite same about audio and image files.
Routine reads file by 4-16kb blocks and when hardware involves errors, the size of block decrease two times and so on until the moment when block of data will be read without any errors, or it reach minimum read size block, depending on file system, then program fills one block with random data and starts to read second one. After successfully reading data, block size increase two times again and again to reach maximum size.