Usage: llverdev [OPTION]... <device-name> ...
Block device verification tool.
	-c|--chunksize chunk_mb, IO size in MB, default=1
	-f|--force, force test to run without confirmation
	-h|--help, display this help and exit
	-l|--long, --full check of device
	-o|--offset, offset in kB from start of file
	-p|--partial, for partial check (1GB steps)
	-q|--quiet
	-r|--read, run in verify mode
	-s|--size, file/device size in MB to read/write
	-t|--timestamp seconds, set verification timestamp
	-v|--verbose
	-w|--write, run in test-pattern mode, default=rw