man dd_rescue (Commandes) - copies data from one file (or block device) to another


dd_rescue - copies data from one file (or block device) to another


dd_rescue [options] infile outfile


This manual page documents briefly the dd_rescue command. This manual page was written for the Debian distribution because the original program does not have a manual page.

dd_rescue is a program that copies data from one file or block device to another, it is a tool to help you to save data from crashed partition. It tries to read and if it fails it will go on with the next sectors, where tools like dd will fail. If the copying process is interrupted by the user it is possible to continue at any position later. It can copy backwards.


-s ipos
start position in input file (default=0)
-S opos
start position in output file (def=ipos)
-b softbs
block size for copy operation (def=16384)
-B hardbs
fallback block size in case of errs (def=512)
-e maxerr
exit after maxerr errors (def=0=infinite)
-m maxxfer
maximum amount of data to be transfered (def=0=inf)
-l logfile
name of a file to log errors and summary to (def="")
reverse direction copy (def=forward)
truncate output file (def=no)
abort on Write errors (def=no)
spArse file writing (def=no)
Always write blocks, zeroed if err (def=no)
interactive: ask before overwriting data (def=no)
force: skip some sanity checks (def=no)
quiet operation
verbose operation
display version and exit
Show summary of options


This manual page was written by Ayman Negm <>, for the Debian project (but may be used by others).