NAME thin_check - validates thin provisioning metadata on a device or file SYNOPSIS thin_check [options] {device|file} DESCRIPTION thin_check checks thin provisioning metadata created by the device-mapper thin provisioning target on a device or file. The 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. --skip-mappings Skip checking of the block mappings which make up the bulk of the metadata. --ignore-non-fatal-errors Will only return a non-zero exit code if it finds a fatal error. An example of a nonfatal error is an incorrect data block reference count causing a block to be considered allocated when it in fact isn't. Ignoring errors for a long time is not advised, you really should be using thin_repair to fix them. EXAMPLE Analyses thin provisioning metadata on logical volume /dev/vg/metadata: $ thin_check /dev/vg/metadata The device must not be actively used by the target when running. DIAGNOSTICS thin_check returns an exit code of 0 for success or 1 for error. SEE ALSO thin_dump(8), thin_repair(8), thin_restore(8), thin_rmap(8), thin_metadata_size(8) AUTHOR Joe Thornber , Heinz Mauelshagen