." Text automatically generated by txt2man thin_dump - Online Linux Manual PageSection : 8
Updated : Device Mapper Tools
Source : System Manager's Manual
NAMEthin_dump - dump thin provisioning metadata from device or file to standard output.
SYNOPSIS.fam C thin_dump [options] {device|file} .fam T
DESCRIPTIONthin_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. .fam C Custom formats are supported via shared library plugins. They should be specified as in this example: .fam C $ thin_dump --format custom=mylib.so /dev/sda .fam T-r, --repair  Repair the metadata whilst dumping it. -m, --metadata-snap{=<block nr>}  Dump metadata snapshot. .fam C 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. .fam T--dev-id {natural}  Dump the specified device. .fam C This option may be specified multiple times to select more than one thin device. .fam T--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.
EXAMPLESDumps the thin provisioning metadata on logical volume /dev/vg/metadata to standard output in human readable format: .fam C $ thin_dump -f human_readable /dev/vg/metadata .fam TDumps the thin provisioning metadata on logical volume /dev/vg/metadata to standard output in XML format: .fam C $ thin_dump /dev/vg/metadata .fam TDumps the thin provisioning metadata snapshot on logical volume /dev/vg/metadata to standard output in human readable format (not processable by thin_restore(8)): .fam C $ thin_dump --format human_readable --metadata-snap /dev/vg/metadata .fam T
DIAGNOSTICSthin_dump returns an exit code of 0 for success or 1 for error.
SEE ALSOthin_check(8), thin_repair(8), thin_restore(8), thin_rmap(8), thin_metadata_size(8)
AUTHORJoe Thornber <ejt@redhat.com>, Heinz Mauelshagen <HeinzM@RedHat.com> 0
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