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 <> Heinz Mauelshagen <>

Red Hat, Inc. Thin Provisioning Tools CACHE_CHECK(8)