Usage: sg_senddiag [--doff] [--extdur] [--help] [--hex] [--list]
                   [--maxlen=LEN] [--page=PG] [--pf] [--raw=H,H...]
                   [--selftest=ST] [--test] [--timeout=SECS] [--uoff]
                   [--verbose] [--version] [DEVICE]
  where:
    --doff|-d       device online (def: 0, only with '--test')
    --extdur|-e     duration of an extended self-test (from mode page 0xa)
    --help|-h       print usage message then exit
    --hex|-H        output RDR in hex; twice: plus ASCII; thrice: suitable
                    for '--raw=-' with later invocation
    --list|-l       list supported page codes (with or without DEVICE)
    --maxlen=LEN|-m LEN    parameter list length or maximum allocation
                           length (default: 4096 bytes)
    --page=PG|-P PG    do RECEIVE DIAGNOSTIC RESULTS only, set PCV
    --pf|-p         set PF bit (def: 0)
    --raw=H,H...|-r H,H...    sequence of hex bytes to form diag page to send
    --raw=-|-r -    read stdin for sequence of bytes to send
    --selftest=ST|-s ST    self-test code, default: 0 (inactive)
                           1->background short, 2->background extended
                           4->abort test
                           5->foreground short, 6->foreground extended
    --test|-t       default self-test
    --timeout=SECS|-T SECS    timeout for foreground self tests
                            unit: second (def: 7200 seconds)
    --uoff|-u       unit offline (def: 0, only with '--test')
    --verbose|-v    increase verbosity
    --old|-O        use old interface (use as first option)
    --version|-V    output version string then exit

Performs a SCSI SEND DIAGNOSTIC (and/or a RECEIVE DIAGNOSTIC RESULTS) command