Unrecognized option: -help
Usage: sg_scan [-a] [-i] [-n] [-v] [-V] [-w] [-x] [DEVICE]*
  where:
    -a    do alpha scan (ie sga, sgb, sgc)
    -i    do SCSI INQUIRY, output results
    -n    do numeric scan (ie sg0, sg1...) [default]
    -v    increase verbosity
    -V    output version string then exit
    -w    force open with read/write flag
    -x    extra information output about queuing
   DEVICE    name of device