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

thin_repair - repair thin provisioning binary metadata.

thin_repair [options] -i {device|file} -o {device|file}

thin_repair reads binary thin provisioning metadata created by the respective device-mapper target from one device or file, repairs it and writes it to different device or file. If written to a metadata device, the metadata can be processed by the device-mapper target.

This tool cannot be run on live metadata.

-h, --help
Print help and exit.
-V, --version
Print version information and exit.
-i, --input {device|file}
Input file or device with binary data.
-o, --output {device|file}
Output file or device for binary data.
If a file is used for output, then it must be preallocated, and large
enough to hold the metadata.
--transaction-id {natural}
Override the transaction id given in the input xml.
--data-block-size {natural}
Override the data block size given in the input xml.
--nr-data-blocks {natural}
Override the nr data blocks given in the input xml.

Reads the binary thin provisioning metadata from file metadata, repairs it and writes it to logical volume /dev/vg/metadata for further processing by the respective device-mapper target:
$ thin_repair -i metadata -o /dev/vg/metadata

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

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

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