thin_check

thin_check [options] {device|file}

thin_check checks thin provisioning metadata created by the device-mapper thin provisioning target on a device or file.

This tool cannot be run on live metadata.

-q, --quiet

Suppress output messages, return only exit code.

-h, --help

Print help and exit.

-V, --version

Output version information and exit.

--super-block-only

Only check the superblock is present.

--skip-mappings

Skip checking of the block mappings which make up the bulk of the metadata.

--ignore-non-fatal-errors

thin_check will only return a non-zero exit code if it finds a fatal error. An example of a non fatal error is an incorrect data block reference count causing a block to be considered allocated when it in fact isn't. Ignoring errors for a long time is not advised, you really should be using thin_repair to fix them.

Analyses thin provisioning metadata on logical volume /dev/vg/metadata:

thin_check /dev/vg/metadata

The device must not be actively used by the target when running.

thin_check returns an exit code of 0 for success or 1 for error.

thin_dump(8) thin_repair(8) thin_restore(8) thin_rmap(8) thin_metadata_size(8)

Joe Thornber <ejt@redhat.com>
Heinz Mauelshagen <HeinzM@RedHat.com>