btrfs-image - create/restore an image of the filesystem
is used to create an image of a btrfs filesystem. All data will be zeroed,
but metadata and the like is preserved.
is the special file corresponding to the device containing a btrfs filesystem.
is the image file that btrfs-image creates. When used with -r option,
btrfs-image restores the image file from source into target.
restore metadump image.
compression level (0 ~ 9).
number of threads (1 ~ 32) to be used to process the image dump or restore.
is part of btrfs-progs. Btrfs is currently under heavy development,
and not suitable for any uses other than benchmarking and review.
Please refer to the btrfs wiki
http://btrfs.wiki.kernel.org for further details.