NAME

       cache_check - repair cache metadata on device or file

SYNOPSIS

       cache_check [options] {device|file}

DESCRIPTION

       cache_check  checks  cache  metadata created by the device-mapper cache 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.

       --skip-hints
              Skip checking of the policy hint values metadata.

       --skip-discards
              Skip checking of the discard bits in the metadata.

EXAMPLE

       Analyses and repairs cache metadata on logical volume /dev/vg/metadata:

       cache_check /dev/vg/metadata

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

DIAGNOSTICS

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

SEE ALSO

       cache_dump(8) cache_repair(8) cache_restore(8)

AUTHOR

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