Manpages - 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 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.

-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.

–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.

–skip-mappings

Do not dump the mappings.

-o {xml file}

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>

Information about thin_dump.8 is found in manpage for: $ thin_dump –format custom=mylib.so /dev/sda