Version string: 4.95 20160121

Usage: sg_rbuf [--buffer=EACH] [--dio] [--echo] [--help] [--mmap] [--quick] [--size=OVERALL] [--time] [--verbose] [--version] DEVICE where: --buffer=EACH|-b EACH buffer size to use (in bytes) --dio|-d requests dio ('-q' overrides it) --echo|-e use echo buffer (def: use data mode) --help|-h print usage message then exit --mmap|-m requests mmap-ed IO (overrides -q, -d) --quick|-q quick, don't xfer to user space --size=OVERALL|-s OVERALL total size to read (in bytes) default: 200 MiB --time|-t time the data transfer --verbose|-v increase verbosity (more debug) --version|-V print version string then exit Use SCSI READ BUFFER command (data or echo buffer mode, buffer id 0) repeatedly