CACHE_CHECK(8)		    System Manager's Manual		CACHE_CHECK(8)



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>



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