dsfok

dsfo is a free program that can save a block of data of any size from any location within a file.
With the DS File Ops Kit you can:
- backup any disk partition, including "live" and "hidden"
- backup entire disk, including "live"
- create an ISO CD-ROM or DVD-ROM image
- create a floppy disk image
- restore a floppy disk image
- save a block of data of any size from any location within a file
- overwrite a block of data of any size at any location within a file
- instantly create a file of any size
- truncate or extend files
- encrypt or decrypt files and directly overwrite them
- scan the volumes of a computer and get detailed infos
- check MD5 signature of a partial or complete data object
- join two files
- scramble a file with the contents of another one (OTP)
- do a bitwise reversion operation on any file
- securely erase files, partitions and disks
EXPERIMENTAL FEATURES
- restore disk partitions
- restore entire disk
(fast sector-level transfer)