Usage: sg_requests [--desc] [--error] [--help] [--hex] [--maxlen=LEN]
                   [--num=NUM] [--number=NUM] [--progress] [--raw]
                   [--status] [--time] [--timeout=SE] [--verbose]
                   [--version] DEVICE
  where:
    --desc|-d         set flag for descriptor sense format
    --error|-e        change opcode to 0xff; to measure overhead
                      twice: skip ioctl call
    --help|-h         print out usage message
    --hex|-H          output in hexadecimal
    --maxlen=LEN|-m LEN    max response length (allocation length in cdb)
                           (def: 0 -> 252 bytes)
    --num=NUM|-n NUM  number of REQUEST SENSE commands to send (def: 1)
    --number=NUM      same action as '--num=NUM'
    --progress|-p     output a progress indication (percentage) if available
    --raw|-r          output in binary (to stdout)
    --status|-s       set exit status from parameter data (def: only set
                       exit status from autosense)
    --time|-t         time the transfer, calculate commands per second
    --verbose|-v      increase verbosity
    --version|-V      print version string and exit

Performs a SCSI REQUEST SENSE command