ddrescuelog - Man Page

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.


-h,  --help

display this help and exit

-V,  --version

output version information and exit

-a,  --change-types=<ot>,<nt>

change the block types of mapfile

-A,  --annotate-mapfile

add comments with human-readable pos/sizes

-b,  --block-size=<bytes>

block size in bytes [default 512]

-B,  --binary-prefixes

show binary multipliers in numbers [SI]

-c,  --create-mapfile[=<tt>]

create mapfile from list of blocks [+-]

-C,  --complete-mapfile[=<t>]

complete mapfile adding blocks of type t [?]

-d,  --delete-if-done

delete the mapfile if rescue is finished

-D,  --done-status

return 0 if rescue is finished

-f,  --force

overwrite existing output files

-i,  --input-position=<bytes>

starting position of rescue domain [0]

-l,  --list-blocks=<types>

print block numbers of given types (?*/-+)

-L,  --loose-domain

accept an incomplete domain mapfile

-m,  --domain-mapfile=<file>

restrict domain to finished blocks in file

-n,  --invert-mapfile

invert block types (finished <--> others)

-o,  --output-position=<bytes>

starting position in output file [ipos]

-p,  --compare-mapfile=<file>

compare block types in domain of both files

-P,  --compare-as-domain=<file>

like -p but compare finished blocks only

-q,  --quiet

suppress all messages

-s,  --size=<bytes>

maximum size of rescue domain to be processed

-t,  --show-status

show a summary of mapfile contents

-v,  --verbose

be verbose (a 2nd -v gives more)

-x,  --xor-mapfile=<file>

XOR the finished blocks in file with mapfile

-y,  --and-mapfile=<file>

AND the finished blocks in file with mapfile

-z,  --or-mapfile=<file>

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 (eg, bug) which caused ddrescuelog to panic.

Reporting Bugs

Report bugs to bug-ddrescue@gnu.org
Ddrescue home page: http://www.gnu.org/software/ddrescue/ddrescue.html
General help using GNU software: http://www.gnu.org/gethelp


February 2020 ddrescuelog 1.25