1BTRFS-IMAGE(8)                       BTRFS                      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
14       for 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     Restore  metadump  image.  By  default, this fixes super's chunk
24              tree, by using 1 stripe pointing to primary device, so that file
25              system can be restored by running tree log reply if possible. To
26              restore without changing number of stripes in chunk  tree  check
27              -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
34              or restore.
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36       -o     Use the old restore method, this does not fixup the  chunk  tree
37              so the restored file system will not be able to be mounted.
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39       -s     Sanitize  the file names when generating the image. One -s means
40              just generate random garbage, which means that the directory in‐
41              dexes  won't  match  up  since  the  hashes won't match with the
42              garbage filenames. Using -ss will calculate a collision for  the
43              filename  so  that the hashes match, and if it can't calculate a
44              collision then it will just  generate  garbage.   The  collision
45              calculator  is very time and CPU intensive so only use it if you
46              are having problems with your file system tree and need to  have
47              it mostly working.
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49       -w     Walk  all the trees manually and copy any blocks that are refer‐
50              enced. Use this option if your extent tree is corrupted to  make
51              sure that all of the metadata is captured.
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53       -m     Restore  for multiple devices, more than 1 device should be pro‐
54              vided.
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EXIT STATUS

57       btrfs-image will return 0 if no error happened.  If any  problems  hap‐
58       pened, 1 will be returned.
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SEE ALSO

61       mkfs.btrfs(8)
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64       2022
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695.18                             May 25, 2022                   BTRFS-IMAGE(8)
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