Usage: sdparm [--all] [--dbd] [--examine] [--flexible] [--get=STR] [--hex]
              [--long] [--num-desc] [--out-mask=OM] [--page=PG[,SPG]]
              [--quiet] [--readonly] [--six] [--transport=TN] [--vendor=VN]
              [--verbose] DEVICE [DEVICE...]

       sdparm [--clear=STR] [--defaults] [--dummy] [--flexible]
              [--page=PG[,SPG]] [--quiet] [--readonly] [--save] [--set=STR]
              [--six] [--transport=TN] [--vendor=VN] [--verbose]
              DEVICE [DEVICE...]

       sdparm   << for more usages, see 'sdparm -hh' >>

  where mode page read (1st usage) and change (2nd usage) options are:
    --all | -a            list all known pages and fields for given DEVICE
    --clear=STR | -c STR    clear (zero) field value(s), or set to 'val'
    --dbd | -B            set DBD bit in mode sense cdb
    --defaults | -D       set a mode page to its default values
                          when use twice set all pages to their defaults
    --dummy | -d          don't write back modified mode page
    --examine | -E        cycle through mode or vpd page numbers (default
                          with '-a': only check pages with known fields)
    --flexible | -f       compensate for common errors, relax some checks
    --get=STR | -g STR    get (fetch) field value(s), by acronym or pos
    --hex | -H            output in hex rather than name/value pairs
    --long | -l           add description to field output
    --num-desc | -n       report number of mode page descriptors
    --out-mask=OM | -o OM    select whether current, changeable, default
                             and/or saveable values out, (def: all(0xf)
    --page=PG[,SPG] | -p PG[,SPG]    page (and optionally subpage) number
                          [or abbrev] to output, change or enumerate
    --quiet | -q          suppress DEVICE vendor/product/revision string line
    --readonly | -r       force read-only open of DEVICE (def: depends
                          on operation). Mainly for ATA disks
    --save | -S           place mode changes in saved page as well
    --set=STR | -s STR    set field value(s) to 1, or to 'val'
    --six | -6            use 6 byte SCSI mode cdbs (def: 10 byte)
    --transport=TN | -t TN    transport protocol number [or abbrev]
    --vendor=VN | -M VN    vendor (manufacturer) number [or abbrev]
    --verbose | -v        increase verbosity

View or change SCSI mode page fields (e.g. of a disk or CD/DVD drive).
STR can be <acronym>[=val] or <start_byte>:<start_bit>:<num_bits>[=val].
Use '-h' or '--help' twice for help on other usages including executing
some simple commands, reading and decoding VPD pages, enumerating internal
tables of mode and VPD pages, and decoding response data supplied in a
file or stdin (rather than from a DEVICE).