1BTRFS-IMAGE(8)                   Btrfs Manual                   BTRFS-IMAGE(8)
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NAME

6       btrfs-image - create/restore an image of the filesystem
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SYNOPSIS

9       btrfs-image [options] <source> <target>
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DESCRIPTION

12       btrfs-image is used to create an image of a btrfs filesystem. All data
13       will be zeroed, but metadata and the like is preserved. Mainly used for
14       debugging purposes.
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16       In the dump mode, source is the btrfs device/file and target is the
17       output file (use - for stdout).
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19       In the restore mode (option -r), source is the dumped image and target
20       is the btrfs device/file.
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OPTIONS

23       -r
24           Restore metadump image. By default, this fixes super’s chunk tree,
25           by using 1 stripe pointing to primary device, so that file system
26           can be restored by running tree log reply if possible. To restore
27           without changing number of stripes in chunk tree check -o option.
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29       -c <value>
30           Compression level (0 ~ 9).
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32       -t <value>
33           Number of threads (1 ~ 32) to be used to process the image dump or
34           restore.
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36       -o
37           Use the old restore method, this does not fixup the chunk tree so
38           the restored file system will not be able to be mounted.
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40       -s
41           Sanitize the file names when generating the image. One -s means
42           just generate random garbage, which means that the directory
43           indexes won’t match up since the hashes won’t match with the
44           garbage filenames. Using -ss will calculate a collision for the
45           filename so that the hashes match, and if it can’t calculate a
46           collision then it will just generate garbage. The collision
47           calculator is very time and CPU intensive so only use it if you are
48           having problems with your file system tree and need to have it
49           mostly working.
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51       -w
52           Walk all the trees manually and copy any blocks that are
53           referenced. Use this option if your extent tree is corrupted to
54           make sure that all of the metadata is captured.
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56       -m
57           Restore for multiple devices, more than 1 device should be
58           provided.
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EXIT STATUS

61       btrfs-image will return 0 if no error happened. If any problems
62       happened, 1 will be returned.
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SEE ALSO

65       mkfs.btrfs(8)
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69Btrfs v5.1                        05/17/2019                    BTRFS-IMAGE(8)
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