era_invalidate man page

era_invalidate — Provide a list of blocks that have changed since a particular era.


era_invalidate [options] {device|file}


era_invalidate Examines era metadata and lists blocks that may have changed since a given era.

This tool cannot be run on live metadata unless the --metadata-snap option is used.


-h, --help

Print help and exit.

-V, --version

Output version information and exit.

-o <output file>

Write output to a file rather than stdout


List the blocks that may have been written since the beginning of era 13 on the metadata device /dev/vg/metadata.

era_invalidate --written-since 13 /dev/vg/metadata

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


era_invalidate returns an exit code of 0 for success or 1 for error (eg, metadata corruption).

See Also

era_check(8), era_dump(8), era_repair(8), era_restore(8)


Joe Thornber <>

Referenced By

era_check(8), era_dump(8).

Thin Provisioning Tools Red Hat, Inc.