Repair binary cache metadata, and write it to a different device or file

Usage: cache_writeback [OPTIONS] --metadata-device <FILE> --origin-device <FILE> --fast-device <FILE>

Options:
      --buffer-size-meg <MB>            Specify the size for the data cache, in megabytes
      --fast-device <FILE>              Specify the fast device containing the data that needs to be written back
      --fast-device-offset <SECTORS>    Specify the data offset within the fast device
  -h, --help                            Print help
      --list-failed-blocks              List any blocks that failed the writeback process
      --metadata-device <FILE>          Specify the cache metadata device
      --no-metadata-update              Do not clear the dirty flags in metadata
      --origin-device <FILE>            Specify the slow device begin cached
      --origin-device-offset <SECTORS>  Specify the data offset within the slow device
  -q, --quiet                           Suppress output messages, return only exit code.
      --retry-count <CNT>               Specify how many times to retry data copying on failed data block [default: 0]
  -V, --version                         Print version