sg_rep_density: unrecognized option '--json'
Usage: sg_rep_density  [--help] [--hex] [--inhex=FN] [--maxlen=LEN] [--media]
                   [--raw] [--readonly] [--typem] [--verbose] [--version]
                   DEVICE
  where:
    --help|-h          prints out this usage message
    --hex|-H           output response in hexadecimal (default); used
                       twice: hex without addresses at start of line
    --inhex=FN         decode contents of FN, ignore DEVICE
    --maxlen=LEN|-m LEN    max response length (allocation length in cdb)
                           (def: 512 bytes)
    --media|-M         report on media in drive (def: report on drive)
    --raw|-r           output response in binary
    --readonly|-R      open DEVICE read-only (def: read-write)
    --typem|-t         report medium types (def: density codes)
    --verbose|-v       increase verbosity
    --version|-V       print version string and exit

Sends a SCSI REPORT DENSITY SUPPORT command outputs the response in
ASCII hexadecimal or binary. By default it reports on density codes supported
by the drive (LU).