SIMPLE SOLUTIONS

CACHE_CHECK(8) - Linux man page online | Administration and privileged commands

Validates cache metadata on a device or file.

Chapter
Device Mapper Tools
cache_check(8) System Manager's Manual cache_check(8)

NAME

cache_check - validates cache metadata on a 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

-h, --help Print help and exit. -V, --version Output version information and exit. -q, --quiet Suppress output messages, return only exit code. --super-block-only Only check the superblock. --skip-hints Skip checking of the policy hint values metadata. --skip-discards Skip checking of the discard bits in the metadata. --clear-needs-check-flag Clears the 'needs_check' flag in the superblock. The kernel may set a flag to force the pool to be checked before it's next activated. Set this switch to clear the flag if the check is successful. If the metadata check failed, the flag is not cleared and a cache_repair run is needed to fix any issues. After cache_repair succeeded, you may run cache_check again.

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 <@redhat.com>, Heinz Mauelshagen <@RedHat.com>
System Manager's Manual Device Mapper Tools cache_check(8)
This manual Reference Other manuals
cache_check(8) referred by cache_dump(8) | cache_repair(8) | cache_restore(8) | cache_writeback(8)
refer to cache_dump(8) | cache_repair(8) | cache_restore(8)
Download raw manual
Main page System Manager's Manual (+2060) System Manager's Manual (+19) № 8 (+5755)
Go top