Designed to recover files from partly unreadable disks, diskettes, or other media. 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 skips one block and starts to read second one. After successfully reading data, block size increase two times again and again to reach maximum size. Version 1.21 may include unspecified updates, enhancements, or bug fixes

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