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>