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52 lines
2.0 KiB
Markdown
52 lines
2.0 KiB
Markdown
# ddrescue
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Notes
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-------
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dd_rescue copies data from one file (or block device) to another.
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Help Text
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```
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dd_rescue Version 1.28, garloff@suse.de, GNU GPL
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($Id: dd_rescue.c,v 1.130 2012/05/19 20:46:14 garloff Exp $)
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(compiled Dec 15 2012 12:04:22 by gcc (Debian 4.7.2-4) 4.7.2)
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(features: O_DIRECT splice )
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dd_rescue copies data from one file (or block device) to another.
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USAGE: dd_rescue [options] infile outfile
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Options: -s ipos start position in input file (default=0),
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-S opos start position in output file (def=ipos),
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-b softbs block size for copy operation (def=65536, 1048576 for -d),
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-B hardbs fallback block size in case of errs (def=4096, 512 for -d),
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-e maxerr exit after maxerr errors (def=0=infinite),
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-m maxxfer maximum amount of data to be transfered (def=0=inf),
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-y syncfrq frequency of fsync calls on outfile (def=512*softbs),
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-l logfile name of a file to log errors and summary to (def=""),
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-o bbfile name of a file to log bad blocks numbers (def=""),
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-r reverse direction copy (def=forward),
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-t truncate output file (def=no),
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-d/D use O_DIRECT for input/output (def=no),
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-k use efficient in-kernel zerocopy splice
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-w abort on Write errors (def=no),
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-a spArse file writing (def=no),
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-A Always write blocks, zeroed if err (def=no),
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-i interactive: ask before overwriting data (def=no),
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-f force: skip some sanity checks (def=no),
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-p preserve: preserve ownership / perms (def=no),
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-q quiet operation,
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-v verbose operation,
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-V display version and exit,
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-h display this help and exit.
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Sizes may be given in units b(=512), k(=1024), M(=1024^2) or G(1024^3) bytes
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This program is useful to rescue data in case of I/O errors, because
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it does not necessarily abort or truncate the output.
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```
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Example Usage
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Links
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