thin_rmap(8) System Manager's Manual thin_rmap(8)

thin_rmap - output reverse map of a thin provisioned region of blocks from metadata device or file.

thin_rmap [options] {device|file}

thin_rmap outputs the reverse mapping stored in the metadata on a device or file between a region of thin provisioned pool blocks and the associated thin provisioned devices.

This tool cannot be run on live metadata.

-h, --help
Print help and exit.
-V, --version
Print version information and exit.
--region {block range}
Specify range of blocks on the data device.
At least one region must be specified.  Multiple regions may be specified.
The range takes the format <begin>..<one past the end>.  For example,
"5..45" specifies data blocks 5 to 44 inclusive, but not 45.

$ thin_rmap --region 5..45 /dev/pool-metadata

thin_rmap returns an exit code of 0 for success or 1 for error.

thin_check(8), thin_dump(8), thin_repair(8), thin_restore(8), thin_metadata_size(8)

Joe Thornber <>, Heinz Mauelshagen <>
Device Mapper Tools System Manager's Manual