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       sg_modes   [-a]   [-c=<page_control>]   [-d]   [-h]   [-l]
       [-p=<page_code>] [-subp=<sub_page_code>]  [-V]  [-6]  [-?]


       This  utility sends a MODE SENSE SCSI command (the 10 byte
       variant by default) to the given device and  then  outputs
       the  response.  There is no facility to change the page or
       descriptor data with this utility.

       -a     lists all the mode pages supported by the device.

              up to four different versions os each page are held
              by  the  device:  the  current  values  [0] are the
              default (i.e. when this parameter  is  not  given),
              the  changeable  values [1] (bit mask showing which
              parts could be changed with a MODE SELECT), default
              value [2] (from the manufacturer?) and saved values
              [4] (when this device was last power cycled?).

       -d     disable block descriptors. By  default  MODE  SENSE
              returns  in its response block descriptors and this
              parameter can be used to suppress them.

       -h     currently only suppresses the printing out of known
              page code descriptions

       -l     lists  all  known  page codes. These are mainly for
              direct access devices (disks) and those that  apply
              to  all  devices. Ignores the given device and most
              other parameters.

              page code to fetch. Should be a hexadecimal  number
              between  0 and 0x3f inclusive. The default value is

              sub page code to fetch.  Should  be  a  hexadecimal
              number  between  0  and 0xff inclusive. The default
              value is 0.

       -V     print out version string

       -6     by default this utility sends out a  10  byte  MODE
              SENSE  command. However some SCSI devices only sup­
              port 6 byte MODE SENSE commands (e.g.  SCSI-2  tape
              drives).  This  parameter  forces the use of 6 byte
              MODE SENSE commands.

       devices  (e.g. disks and SCSI DVDs) can also be specified.
       For example "sg_modes -a /dev/sda" will work  in  the  2.5
       series kernels.


       Written by Doug Gilbert


       Report bugs to <dgilbert@interlog.com>.


       Copyright © 2000-2003 Douglas Gilbert
       This  software  is  distributed  under  the GPL version 2.
       There is NO warranty; not even for MERCHANTABILITY or FIT­


       sginfo(this  package),  sgmode(scsirastools), scsiinfo(see
       net), scu(see net) seatools(see seagate)

       All these utilities offer some  facility  to  change  mode
       page (or block descriptor) parameters.

sg3_utils-1.04              April 2003                SG_MODES(8)



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