


DDRESCUE(1)               User Commands               DDRESCUE(1)


NAME
       ddrescue - data recovery tool

SYNOPSIS
       ddrescue [options] infile outfile [logfile]

DESCRIPTION
       GNU  ddrescue - Data recovery tool.  Copies data from one file or block
       device to another, trying hard to rescue data in case of read errors.

       You should use a logfile unless you know what you are doing.

OPTIONS
       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       -b, --block-size=<bytes>
              sector size of input device [default 512]

       -B, --binary-prefixes
              show binary multipliers in numbers [SI]

       -c, --cluster-size=<sectors>
              sectors to copy at a time [128]

       -C, --complete-only
              do not read new data beyond logfile limits

       -d, --direct
              use direct disc access for input file

       -D, --synchronous
              use synchronous writes for output file

       -e, --max-errors=<n>
              maximum number of error areas allowed

       -F, --fill=<types>
              fill given type blocks with infile data (?*/-+)

       -g, --generate-logfile
              generate approximate logfile from partial copy

       -i, --input-position=<pos>
              starting position in input file [0]

       -m, --domain-logfile=<file>
              restrict domain to finished blocks in file

       -n, --no-split
              do not try to split or retry failed blocks



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DDRESCUE(1)               User Commands               DDRESCUE(1)


       -o, --output-position=<pos>
              starting position in output file [ipos]

       -q, --quiet
              suppress all messages

       -r, --max-retries=<n>
              exit after given retries (-1=infinity) [0]

       -R, --retrim
              mark all failed blocks as non-trimmed

       -s, --max-size=<bytes>
              maximum size of input data to be copied

       -S, --sparse
              use sparse writes for output file

       -t, --truncate
              truncate output file to zero size

       -T, --try-again
              mark non-split, non-trimmed blocks as non-tried

       -v, --verbose
              verbose operation

       Numbers may be followed by a multiplier: b = blocks, k = kB  =  10^3  =
       1000, Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30,
       etc...

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

COPYRIGHT
       Copyright (C) 2010 Antonio Diaz Diaz.  License GPLv3+: GNU GPL  version
       3 or later <http://gnu.org/licenses/gpl.html>
       This  is  free  software:  you  are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

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

              info ddrescue

       should give you access to the complete manual.







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