# Text automatically generated by txt2man

     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 begin-
          ning 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 run-
          ning.

     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>

     Page 1               System Manager's Manual    (printed 5/24/22)