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

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

thin_dump [options] {device|file}

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 formatted 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.

Print help and exit.
Print version information and exit.
Choose output format.

Custom formats are supported via shared library plugins. They should be
specified as in this example:
$ thin_dump --format custom=mylib.so /dev/sda
Repair the metadata whilst dumping it.
Dump metadata snapshot.

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

This option may be specified multiple times to select more than one thin
device.
Override the transaction id given in the input xml.
Override the data block size given in the input xml.
Override the nr data blocks given in the input xml.
Do not dump the mappings.
Specify a file for the output rather than writing to stdout.

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

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

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

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

Device Mapper Tools System Manager's Manual