era_invalidate (8) Linux Manual Page
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 [at] redhat.com>