Provided by: sg3-utils_1.17-2_i386 bug


       sg_get_config  -  invoke  SCSI  GET CONFIGURATION command on a (cd/dvd)


       sg_get_config  [--brief]  [--current]  [--help]  [--hex]  [--inner-hex]
       [--list] [--rt=<n>] [--starting=<n>] [--verbose] [--version] <device>


       Sends  a  SCSI  GET CONFIGURATION command to the given Linux device and
       decodes the response. The response includes the features  and  profiles
       of  the device. Typically these devices are CD and DVD players that may
       (but not necessarily) have media in them. These  devices  may  well  be
       connected  via  ATAPI,  USB or IEEE 1394 transports. In such cases they
       are "SCSI" devices only in the sense that  they  use  the  "Multi-Media
       command"  set  (MMC).  MMC  is  a  specialized  SCSI  command set whose
       definition can be found at .

       This utility is based on the  MMC-4  and  MMC-5  draft  standards.  See
       section  5  on  "Features and Profile for Multi_Media devices" for more
       information  on  specific  feature   parameters   and   profiles.   The
       manufacturer’s product manual may also be useful.

       Since  modern  DVD  writers  support  many  features  and profiles, the
       decoded output from this utility can be large. There are  various  ways
       to  cut  down  the  output.  If  the  ’--brief’ option is used only the
       feature names are shown and the feature  parameters  are  not  decoded.
       Alternatively  if only one feature is of interest then this combination
       of options is appropriate: "--rt=2 --starting=<feature_code>".  Another
       possibility is to show only the features that are relevant to the media
       in the drive (i.e. "current") with the "--rt=1" option.

       --brief | -b
              show the feature names but don’t decode the parameters of  those
              features.   When  used with ’--list’ outputs known feature names
              but not known profile names.

       --current | -c
              output features marked as current. This option is equivalent  to

       --help | -h
              output the usage message then exit.

       --hex | -H
              output the response in hex (don’t decode response).

       --inner-hex | -i
              decode to the feature name level then output each feature’s data
              in hex.

       --list | -l
              list all known feature and profile names. Ignore the device name
              (if  given).   Simply  lists  the  feature  names  and  profiles
              (followed by their hex values) that this utility knows about. If
              ’--brief’ is also given then only feature names are listed.

       --rt=<n> | -r <n>
              RT  value  given  to GET CONFIGURATION command. Allowable values
              are 0, 1, 2, or 3 . The command’s action  also  depends  on  the
              value given to ’--starting=’.  The default value is 0.  When <n>
              is 0 then all features, regardless  of  currency,  are  returned
              (whose  feature code is greater than or equal to the value given
              to ’--starting=’).  When <n> is 1 then all current features  are
              returned  (whose  feature  code  is greater than or equal to the
              value given to ’--starting=’).  When <n> is 2 then  the  feature
              whose feature code is equal to the value given to ’--starting=’,
              if any, is returned.  When <n> is 3  the  response  is  reserved
              (probably yields an "illegal field in cdb" error).

       --starting=<n> | -s <n>
              this  option  works closely with the --rt option. Its value is a
              feature code in the range 0 to 0xffff (inclusive).  Its  default
              value  is  0.  A  value  prefixed  with  "0x"  is interpreted as

       --verbose | -v
              increase the level of verbosity, (i.e. debug output).

       --version | -V
              print the version string and then exit.

       There are multiple versions of the MMC (draft) standards:  MMC  [1997],
       MMC-2  [2000],   MMC-3 [2002], MMC-4 and MMC-5. The first three are now
       ANSI INCITS standards with the year  they  became  standards  shown  in
       brackets.  The  draft immediately prior to standardization can be found
       at . In the initial MMC standard there  was  no  GET
       CONFIGURATION  command  and  the relevant information was obtained from
       the "CD capabilities and mechanical status mode page" (mode page 0x2a).
       It  was  later  renamed the "MM capabilities and mechanical status mode
       page"  and  has  been  made  obsolete  in  MMC-4  and  MMC-5.  The  GET
       CONFIGURATION  command  was  introduced  in  MMC-2  and  has  become  a
       replacement for that mode page. New features such as support  for  "BD"
       (blue  ray) media type can only be found by using the GET CONFIGURATION
       command. Hence older CD players may not support the  GET  CONFIGURATION
       command  in  which  case  the  "MM  capabilities ..."  mode page can be
       checked with sdpar, sginfo or sg_modes.

       In the 2.4 series of Linux kernels the given  device  must  be  a  SCSI
       generic  (sg)  device.  In  the  2.6  series  block devices can also be
       specified. For example "sg_get_config /dev/hdc" will work  in  the  2.6
       series  kernels  as  long  as  /dev/hdc  is an ATAPI device. In the 2.6
       series external DVD writers attached via  USB  could  be  queried  with
       "sg_get_config /dev/scd1" for example.


       Written by Douglas Gilbert.


       Report bugs to <dgilbert at interlog dot com>.


       Copyright © 2004-2005 Douglas Gilbert
       This  software  is  distributed  under  a  FreeBSD license. There is NO
       warranty; not even for MERCHANTABILITY  or  FITNESS  FOR  A  PARTICULAR


       sginfo,  sg_modes,  sg_inq,  sg_prevent,  sg_start  (all  in sg3_utils)