Provided by: gddrescue_1.26-2_amd64 bug


       ddrescue - data recovery tool


       ddrescue [options] infile outfile [mapfile]


       GNU  ddrescue  is a data recovery tool. It copies data from one file or block device (hard
       disc, cdrom, etc) to another, trying to rescue the  good  parts  first  in  case  of  read

       Always  use a mapfile unless you know you won't need it. Without a mapfile, ddrescue can't
       resume a rescue, only reinitiate it. Be careful to not specify by mistake an  old  mapfile
       from an unrelated rescue.

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

       If you reboot, check the device names before restarting ddrescue.  Don't use options  '-F'
       or '-G' without reading the manual first.


       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       -a, --min-read-rate=<bytes>
              minimum read rate of good areas in bytes/s

       -A, --try-again
              mark non-trimmed, non-scraped as non-tried

       -b, --sector-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
              don't read new data beyond mapfile limits

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

       -D, --odirect
              use direct disc access for output file

       -e, --max-bad-areas=[+]<n>
              maximum number of [new] bad areas allowed

       -E, --max-error-rate=<bytes>
              maximum allowed rate of read errors per second

       -f, --force
              overwrite output device or partition

       -F, --fill-mode=<types>
              fill blocks of given types with data (?*/-+l)

       -G, --generate-mode
              generate approximate mapfile from partial copy

       -H, --test-mode=<file>
              set map of good/bad blocks from given mapfile

       -i, --input-position=<bytes>
              starting position of domain in input file [0]

       -I, --verify-input-size
              verify input file size with size in mapfile

       -J, --verify-on-error
              reread latest good sector after every error

       -K, --skip-size=[<i>][,<max>]
              initial,maximum size to skip on read error

       -L, --loose-domain
              accept unordered domain mapfile with gaps

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

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

       -n, --no-scrape
              skip the scraping phase

       -N, --no-trim
              skip the trimming phase

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

       -O, --reopen-on-error
              reopen input file after every read error

       -p, --preallocate
              preallocate space on disc for output file

       -P, --data-preview[=<lines>]
              show some lines of the latest data read [3]

       -q, --quiet
              suppress all messages

       -r, --retry-passes=<n>
              exit after <n> retry passes (-1=infinity) [0]

       -R, --reverse
              reverse the direction of all passes

       -s, --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, --timeout=<interval>
              maximum time since last successful read

       -u, --unidirectional
              run all passes in the same direction

       -v, --verbose
              be verbose (a 2nd -v gives more)

       -w, --ignore-write-errors
              make fill mode ignore write errors

       -x, --extend-outfile=<bytes>
              extend outfile size to be at least this long

       -X, --max-read-errors=<n>
              maximum number of read errors allowed

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

       -Z, --max-read-rate=<bytes>
              maximum read rate in bytes/s

       --ask  ask for confirmation before starting the copy

              execute commands from standard input

              select what copying pass(es) to run

              initial delay before checking slow reads [30]

              log significant events in <file>

              log rates and error sizes in <file>

              log all read operations in <file>

              save/sync mapfile at given interval [auto]

              maximum number of slow reads allowed

              time to wait after each read error [0]

              time to wait between passes [0]

              reset slow reads if rate rises above min

              allow infile and outfile to be the same file

       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...  Time intervals have the  format
       1[.5][smhd] or 1/2[smhd].

       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 ddrescue 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 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.