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man pages section 1M: System Administration Commands

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Updated: July 2017

sg_get_config (1m)


sg_get_config - 4 +)


sg_get_config  [--brief]  [--current]  [--help]  [--hex]  [--inner-hex]
[--list] [--raw]  [--readonly]  [--rt=RT]  [--starting=FC]  [--verbose]
[--version] DEVICE


SG_GET_CONFIG(8)                   SG3_UTILS                  SG_GET_CONFIG(8)

       sg_get_config - sends a SCSI GET CONFIGURATION command (MMC-4 +)

       sg_get_config  [--brief]  [--current]  [--help]  [--hex]  [--inner-hex]
       [--list] [--raw]  [--readonly]  [--rt=RT]  [--starting=FC]  [--verbose]
       [--version] DEVICE

       Sends  a  SCSI  GET  CONFIGURATION  command  to  DEVICE and decodes the
       response. The response  includes  the  features  and  profiles  of  the
       device.   Typically  these  devices  are CD, DVD, HD-DVD and BD 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 http://www.t10.org .

       This utility is based on the MMC-4 and later draft standards. See  sec-
       tion  5  on  "Features  and  Profile  for Multi_Media devices" for more
       information on specific feature parameters and profiles.  The  manufac-
       turer's product manual may also be useful.

       Since modern DVD and BD 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.  Alterna-
       tively  if  only  one  feature  is of interest then this combination of
       options is appropriate: "--rt=2 --starting=FC". 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.

       Arguments to long options are mandatory for short options as well.

       -b, --brief
              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.

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

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

       -H, --hex
              output the response in hex (don't decode response).

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

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

       -q, --readonly
              opens  the  DEVICE read-only rather than read-write which is the
              default. The Linux sg driver needs  read-write  access  for  the
              SCSI  GET  CONFIGURATION  command  but  other access methods may
              require read-only access.

       -r, --rt=RT
              where RT is the field of that name in the GET CONFIGURATION cdb.
              Allowable  values  are 0, 1, 2, or 3 . The command's action also
              depends on the value given  to  the  --starting=FC  option.  The
              default  value is 0.  When RT is 0 then all features, regardless
              of currency, are returned (whose feature code is greater than or
              equal to FC given to --starting=). When RT is 1 then all current
              features are returned (whose feature code  is  greater  than  or
              equal  to  FC). When RT is 2 then the feature whose feature code
              is equal to FC, if any, is returned.  When RT is 3 the  response
              is  reserved  (probably yields an "illegal field in cdb" error).
              To simplify the meanings of the RT values are:
                0 : all features, current on not
                1 : only current features
                2 : only feature whose code is FC
                3 : reserved

       -R, --raw
              output response in binary (to stdout). Note that the short  form
              is  -R  unlike  most other utilities in this package that use -r
              for this action.

       -s, --starting=FC
              where FC is the feature code value. This  option  works  closely
              with the --rt=RT option. The FC value is in the range 0 to 65535
              (0xffff) inclusive. Its default value is  0.  A  value  prefixed
              with "0x" (or a trailing 'h') is interpreted as hexadecimal.

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

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

       See attributes(5) for descriptions of the following attributes:

       |Availability   | system/storage/sg3_utils |
       |Stability      | Uncommitted              |
       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  http://www.t10.org  .  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 CONFIGURA-
       TION 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
       sdparm(8), sginfo(8) or sg_modes(8).

       In  the  2.4  series of Linux kernels the 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.

       The exit status of sg_get_config is 0 when it is successful.  Otherwise
       see the sg3_utils(8) man page.

       Written by Douglas Gilbert.

       Report bugs to <dgilbert at interlog dot com>.

       Copyright (C) 2004-2011 Douglas Gilbert
       This  software is distributed under a FreeBSD license. There is NO war-
       ranty; not even for MERCHANTABILITY or FITNESS FOR  A  PARTICULAR  PUR-

       sginfo(8),  sg_modes(8),  sg_inq(8), sg_prevent(8), sg_start(8) [all in
       sg3_utils], sdparm(8)

       This    software    was    built    from    source     available     at
       https://java.net/projects/solaris-userland.    The  original  community
       source was downloaded from  http://sg.danny.cz/sg/p/sg3_utils-1.33.tgz

       Further information about this software can be found on the open source
       community website at http://sg.danny.cz/sg/sg3_utils.html.

sg3_utils-1.31                   February 2011                SG_GET_CONFIG(8)