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).

SEE ALSO

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

AUTHOR

       Joe Thornber <ejt@redhat.com>