2017-09-20 15:45:00 +05:30
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NAME
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thin_dump - dump thin provisioning metadata from device or file to standard output.
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SYNOPSIS
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thin_dump [options] {device|file}
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DESCRIPTION
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thin_dump dumps binary thin provisioning metadata (optionally from alternate
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block; see option --metadata-snap) created by the
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device-mapper thin provisioning target on a device or file to standard
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output for analysis or postprocessing in either XML or human readable format.
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XML formated metadata can be fed into thin_restore (see thin_restore(8))
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in order to put it back onto a metadata device (to process by the
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device-mapper target) or file.
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This tool cannot be run on live metadata unless the --metadata-snap
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option is used.
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OPTIONS
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2017-09-20 18:23:59 +05:30
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-h, --help Print help and exit.
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-V, --version Print version information and exit.
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2017-09-20 15:45:00 +05:30
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-f, --format {xml|human_readable|custom} Choose output format.
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Custom formats are supported via shared library plugins. They should be
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specified as in this example:
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$ thin_dump --format custom=mylib.so /dev/sda
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2017-09-20 18:23:59 +05:30
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-r, --repair Repair the metadata whilst dumping it.
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2018-01-31 20:09:24 +05:30
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-m, --metadata-snap{=<block nr>} Dump metadata snapshot.
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2017-09-20 15:45:00 +05:30
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If block is not provided, access the default metadata snapshot created by
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the thin provisioning device-mapper target, else try the one at block nr.
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See the thin provisioning target documentation on how to create or release
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a metadata snapshot and retrieve the block number from the kernel.
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--dev-id {natural} Dump the specified device.
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This option may be specified multiple times to select more than one thin
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device.
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--skip-mappings Do not dump the mappings.
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-o {xml file} Specify a file for the output rather than writing to stdout.
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EXAMPLES
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Dumps the thin provisioning metadata on logical volume /dev/vg/metadata to
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standard output in human readable format:
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$ thin_dump -f human_readable /dev/vg/metadata
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Dumps the thin provisioning metadata on logical volume /dev/vg/metadata to
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standard output in XML format:
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$ thin_dump /dev/vg/metadata
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Dumps the thin provisioning metadata snapshot on logical volume /dev/vg/metadata
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to standard output in human readable format (not processable by thin_restore(8)):
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$ thin_dump --format human_readable --metadata-snap /dev/vg/metadata
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DIAGNOSTICS
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thin_dump returns an exit code of 0 for success or 1 for error.
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SEE ALSO
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2017-09-20 18:23:59 +05:30
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thin_check(8), thin_repair(8), thin_restore(8), thin_rmap(8), thin_metadata_size(8)
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2017-09-20 15:45:00 +05:30
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AUTHOR
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Joe Thornber <ejt@redhat.com>, Heinz Mauelshagen <HeinzM@RedHat.com>
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