mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-24 23:22:27 +00:00
7ffccaf0c3
A few minor benefits:
* editors set highliting according to the extensions
* web access to the git repository (github) renders the .asciidoc
files:
* we can link to them from the wiki
* the files are editable via browser and such editations can be
submitted for merge easily
Signed-off-by: David Sterba <dsterba@suse.cz>
67 lines
2.0 KiB
Plaintext
67 lines
2.0 KiB
Plaintext
btrfs-image(8)
|
|
==============
|
|
|
|
NAME
|
|
----
|
|
btrfs-image - create/restore an image of the filesystem
|
|
|
|
SYNOPSIS
|
|
--------
|
|
*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.
|
|
Mainly used for debugging purposes.
|
|
|
|
In the dump mode, source is the btrfs device/file and target is the output
|
|
file (use '-' for stdout).
|
|
|
|
In the restore mode (option -r), source is the dumped image and target is the btrfs device/file.
|
|
|
|
|
|
OPTIONS
|
|
-------
|
|
-r::
|
|
Restore 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)
|