era_dump(8) System Manager's Manual era_dump(8)

era_dump - dump era metadata from device or file to standard output.

era_dump [options] {device|file}

era_dump dumps binary era metadata created by the device-mapper era target on a device or file to standard output for analysis or postprocessing in XML format. XML formatted metadata can be fed into era_restore (see era_restore(8)) in order to put it back onto a metadata device (to process by the device-mapper target) or file.

This tool cannot be run on live metadata.

Print help and exit.
Print version information and exit.
Repair the metadata whilst dumping it.
Fold any unprocessed write sets into the final era array.
    You probably want to do this if you're intending to process the results as
    it simplifies the XML.

-o {xml file} Specify a file for the output rather than writing to stdout.

Dumps era metadata on logical volume /dev/vg/metadata to standard output in XML format:

    $ era_dump /dev/vg/metadata

era_dump returns an exit code of 0 for success or 1 for error.

era_check(8), era_restore(8), era_invalidate(8)

Joe Thornber <>

Device Mapper Tools System Manager's Manual