era_invalidate
Section: Maintenance Commands (8)
Updated: Device Mapper Tools
Page Index
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>