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. OPTIONS -h, --help Print help and exit. -V, --version Print version information and exit. -f, --format {xml|human_readable|custom} 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 -r, --repair Repair the metadata whilst dumping it. -m, --metadata-snap {block nr} 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. --dev-id {natural} Dump the specified device. This option may be specified multiple times to select more than one thin device. --skip-mappings Do not dump the mappings. -o {xml file} Specify a file for the output rather than writing to stdout. 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 , Heinz Mauelshagen