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other versions
- wheezy 0.19+20120328-7.1
- wheezy-backports 3.17-1.1~bpo70+1
- jessie 3.17-1.1
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- testing 4.7.3-1
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BTRFS-IMAGE(8) | Btrfs Manual | BTRFS-IMAGE(8) |
NAME¶
btrfs-image - create/restore an image of the filesystemSYNOPSIS¶
btrfs-image [options] <source> <target>DESCRIPTION¶
btrfs-image is used to create an image of a btrfs filesystem. All data will be zeroed, but metadata and the like is preserved.OPTIONS¶
-rRestore metadump image. By default, this fixes
super’s chunk tree, by using 1 stripe pointing to primary device, so
that file system can be restored by running tree log reply if possible. To
restore without changing number of stripes in chunk tree check -o
option.
-c <value>
Compression level (0 ~ 9).
-t <value>
Number of threads (1 ~ 32) to be used to
process the image dump or restore.
-o
Use the old restore method, this does not
fixup the chunk tree so the restored file system will not be able to be
mounted.
-s
Sanitize the file names when generating the
image. One -s means just generate random garbage, which means that the
directory indexes won’t match up since the hashes won’t match with
the garbage filenames. Using -ss will calculate a collision for the filename
so that the hashes match, and if it can’t calculate a collision then it
will just generate garbage. The collision calculator is very time and CPU
intensive so only use it if you are having problems with your file system tree
and need to have it mostly working.
-w
Walk all the trees manually and copy any
blocks that are referenced. Use this option if your extent tree is corrupted
to make sure that all of the metadata is captured.
-m
Restore for multiple devices, more than 1
device should be provided.
EXIT STATUS¶
btrfs-image will return 0 if no error happened. If any problems happened, 1 will be returned.SEE ALSO¶
mkfs.btrfs(8)06/20/2015 | Btrfs v3.17 |