era_invalidate (8) - Linux Manuals

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

NAME

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

SYNOPSIS

era_invalidate [options] {device|file}

DESCRIPTION

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.

OPTIONS

-h, --help

Print help and exit.

-V, --version

Print version information and exit.

-o {output file}

Write output to a file rather than stdout.

--metadata-snapshot

Use the metadata snapshot rather than the current superblock.

--written-since {era nr}

Blocks written since the given era will be listed.

EXAMPLE

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.

DIAGNOSTICS

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

AUTHOR

Joe Thornber <ejt [at] redhat.com>