NAME¶

thin_dump - dump thin provisioning metadata from device or file to standard output

SYNOPSIS¶

thin_dump [options] {device|file}

DESCRIPTION¶

thin_dump dumps binary thin provisioning metadata (optionally from alternate block; see option --metadata-snap) created by the device-mapper thin provisioning target on a device or file to standard output for analysis or postprocessing in either XML or human readable format. XML formated metadata can be fed into thin_restore (see thin_restore(8)) in order to put it back onto a metadata device (to process by the device-mapper target) or file.

This tool cannot be run on live metadata unless the --metadata-snap option is used.

-f, --format {xml|human_readable}

Print output in XML or human readable format.

-r, --repair

Repair the metadata whilst dumping it.

-m, --metadata-snap[=block#]

Dump metadata snapshot created by device-mapper thin provisioning target. If block is not provided, access the default metadata snapshot created by the thin provisioning device-mapper target, else try the one at block#. See the thin provisioning target documentation on how to create or release a metadata snapshot and retrieve the block number from the kernel.

-h, --help

Print help and exit.

-V, --version

Output version information and exit.

EXAMPLES¶

Dumps the thin provisioning metadata on logical volume /dev/vg/metadata to standard output in human readable format:

thin_dump -f human_readable /dev/vg/metadata

Dumps the thin provisioning metadata on logical volume /dev/vg/metadata to standard output in XML format:

thin_dump /dev/vg/metadata

Dumps the thin provisioning metadata snapshot on logical volume /dev/vg/metadata to standard output in human readable format (not processable by thin_restore(8) ):

thin_dump --format human_readable --metadata-snap /dev/vg/metadata

DIAGNOSTICS¶

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

SEE ALSO¶

thin_check(8) thin_repair(8) thin_restore(8) thin_rmap(8) thin_metadata_size(8)

AUTHOR¶

Joe Thornber <ejt@redhat.com>
Heinz Mauelshagen <HeinzM@RedHat.com>