thin_dump.8

thin_dump

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
DIAGNOSTICS
SEE ALSO
AUTHOR

---

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 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.

OPTIONS

-h, —help

Print help and exit.

-V, —version

Print version information and exit.

-f, —format {xml|human_readable}

Choose output format.

-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 {sectors}

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.

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

---