NAME

       thin_check - validate thin provisioning metadata on device or file

SYNOPSIS

       thin_check [options] {device|file}

DESCRIPTION

       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.

OPTIONS

       -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.

EXAMPLE

       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.

DIAGNOSTICS

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

SEE ALSO

       thin_dump(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>