NAME era_check - validate era metadata on device or file

SYNOPSIS era_check [options] {device|file}

DESCRIPTION era_check checks era metadata created by the device-mapper era 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.

era_check will return a non-zero exit code if it finds a fatal error. If any errors are discovered use era_repair to correct.

EXAMPLE Analyse thin provisioning metadata on logical volume /dev/vg/metadata:

era_check /dev/vg/metadata

The device may not be actively used by the target when running.

DIAGNOSTICS era_check returns an exit code of 0 for success or 1 for error.

SEE ALSO era_dump(8) era_repair(8) era_restore(8) era_invalidate(8)

AUTHOR Joe Thornber <>

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