cache_check(8) 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.

AUTHOR

Joe Thornber <[email protected]>
Heinz Mauelshagen <[email protected]>