1DDRESCUE(1)                      User Commands                     DDRESCUE(1)
2
3
4

NAME

6       ddrescue - data recovery tool
7

SYNOPSIS

9       ddrescue [options] infile outfile [logfile]
10

DESCRIPTION

12       GNU  ddrescue - Data recovery tool.  Copies data from one file or block
13       device to another, trying hard to rescue data in case of read errors.
14
15       You should use a logfile unless you know what you are doing.
16

OPTIONS

18       -h, --help
19              display this help and exit
20
21       -V, --version
22              output version information and exit
23
24       -b, --block-size=<bytes>
25              sector size of input device [default 512]
26
27       -B, --binary-prefixes
28              show binary multipliers in numbers [SI]
29
30       -c, --cluster-size=<sectors>
31              sectors to copy at a time [128]
32
33       -C, --complete-only
34              do not read new data beyond logfile limits
35
36       -d, --direct
37              use direct disc access for input file
38
39       -D, --synchronous
40              use synchronous writes for output file
41
42       -e, --max-errors=<n>
43              maximum number of error areas allowed
44
45       -f, --force
46              overwrite output device or partition
47
48       -F, --fill=<types>
49              fill given type blocks with infile data (?*/-+)
50
51       -g, --generate-logfile
52              generate approximate logfile from partial copy
53
54       -i, --input-position=<pos>
55              starting position in input file [0]
56
57       -m, --domain-logfile=<file>
58              restrict domain to finished blocks in file
59
60       -n, --no-split
61              do not try to split or retry failed blocks
62
63       -o, --output-position=<pos>
64              starting position in output file [ipos]
65
66       -p, --preallocate
67              preallocate space on disc for output file
68
69       -q, --quiet
70              suppress all messages
71
72       -r, --max-retries=<n>
73              exit after given retries (-1=infinity) [0]
74
75       -R, --retrim
76              mark all failed blocks as non-trimmed
77
78       -s, --max-size=<bytes>
79              maximum size of input data to be copied
80
81       -S, --sparse
82              use sparse writes for output file
83
84       -t, --truncate
85              truncate output file to zero size
86
87       -T, --try-again
88              mark non-split, non-trimmed blocks as non-tried
89
90       -v, --verbose
91              verbose operation
92
93       Numbers may be followed by a multiplier: b = blocks, k = kB  =  10^3  =
94       1000, Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30,
95       etc...
96

REPORTING BUGS

98       Report bugs to bug-ddrescue@gnu.org
99       Ddrescue home page: http://www.gnu.org/software/ddrescue/ddrescue.html
100       General help using GNU software: http://www.gnu.org/gethelp
101

103       Copyright © 2010 Antonio Diaz Diaz.  License GPLv3+: GNU GPL version  3
104       or later <http://gnu.org/licenses/gpl.html>
105       This  is  free  software:  you  are free to change and redistribute it.
106       There is NO WARRANTY, to the extent permitted by law.
107

SEE ALSO

109       The full documentation for ddrescue is maintained as a Texinfo  manual.
110       If  the info and ddrescue programs are properly installed at your site,
111       the command
112
113              info ddrescue
114
115       should give you access to the complete manual.
116
117
118
119ddrescue 1.13                     August 2010                      DDRESCUE(1)
Impressum