Name
cache_dump - dump cache metadata from device or file to standard output.Synopsis
cache_dump [options] {device|file}
Description
cache_dump dumps binary cache metadata created by the device-mapper cache target on a device or file to standard output for analysis or postprocessing in XML format. XML formatted metadata can be fed into cache_restore 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.
Options
-h, --help Print help and exit.
-V, --version Print version information and exit.
-r, --repair Repair the metadata whilst dumping it.
-o {xml file} Specify an output file for the xml, rather than printing to stdout.
Examples
Dumps the cache metadata on logical volume /dev/vg/metadata to standard output in XML format:$ cache_dump /dev/vg/metadataDumps the cache metadata on logical volume /dev/vg/metadata whilst repairing it to standard output in XML format:
$ cache_dump --repair /dev/vg/metadata
Diagnostics
cache_dump returns an exit code of 0 for success or 1 for error.See Also
- cache_check(8), cache_repair(8), cache_restore(8)