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ddrescuelog - tool for ddrescue mapfiles


ddrescuelog [options] mapfile


GNU ddrescuelog is a tool that manipulates ddrescue mapfiles, shows mapfile contents, converts mapfiles to/from other formats, compares mapfiles, tests rescue status, and can delete a mapfile if the rescue is done. Ddrescuelog operations can be restricted to one or several parts of the mapfile if the domain setting options are used.

Use '-' as mapfile to read the mapfile from standard input (also in the options taking a mapfile argument) or to write the mapfile created by '--create-mapfile' to standard output.

NOTE: In versions of ddrescue prior to 1.20 the mapfile was called 'logfile'. The format is the same; only the name has changed.


display this help and exit
output version information and exit
change the block types of mapfile
add comments with human-readable pos/sizes
block (sector) size in bytes [default 512]
show binary multipliers in numbers [SI]
create mapfile from list of blocks [+-]
complete mapfile adding blocks of type t [?]
delete the mapfile if rescue is finished
return 0 if rescue is finished
overwrite existing output files
format for -c and -l (list, bitmap-[bl]e)
starting position of rescue domain [0]
print block numbers of given types (?*/-+)
accept unordered domain mapfile with gaps
restrict domain to finished blocks in <file>
invert block types (finished <--> others)
starting position in output file [ipos]
compare block types in domain of both files
like -p but compare finished blocks only
suppress all messages
maximum size of rescue domain to be processed
show a summary of mapfile contents
be verbose (a 2nd -v gives more)
XOR the finished blocks in file with mapfile
AND the finished blocks in file with mapfile
OR the finished blocks in file with mapfile
shift all block positions by (opos - ipos)

Numbers may be in decimal, hexadecimal, or octal, and may be followed by a multiplier: s = sectors, k = 1000, Ki = 1024, M = 10^6, Mi = 2^20, etc...

Exit status: 0 for a normal exit, 1 for environmental problems (file not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or invalid input file, 3 for an internal consistency error (e.g., bug) which caused ddrescuelog to panic.


Report bugs to
Ddrescue home page:
General help using GNU software:


Copyright © 2022 Antonio Diaz Diaz. License GPLv2+: GNU GPL version 2 or later <>
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


The full documentation for ddrescuelog is maintained as a Texinfo manual. If the info and ddrescuelog programs are properly installed at your site, the command

info ddrescue

should give you access to the complete manual.

January 2022 GNU ddrescuelog 1.26