sane-st400(5)            SANE Scanner Access Now Easy            sane-st400(5)

       sane-st400 - SANE backend for Siemens ST/Highscan flatbed scanners

       The  sane-st400  library  implements  a  SANE (Scanner Access Now Easy)
       backend that provides access to Siemens ST400 flatbed scanners and com-
       patibles.   At  present,  the  following scanners are supported by this

              Siemens ST400 (6 bit gray scale)
              Siemens ST800 (6 bit gray scale)

       The driver supports line art and gray scans up to 8bpp.

       The Siemens ST/Highscan series includes several more models,  e.g.  the
       ST300  and ST600.  If you own one of these scanners, or a scanner other
       than the ones listed above that works with this backend, please let  us
       know  by  sending the scanner's model name, SCSI ID, and firmware revi-
       sion   to    Have   a   look   at  concerning subscription
       to sane-devel.

       This backend expects device names of the form:


       Where special is either the path-name for the special device that  cor-
       responds  to a SCSI scanner. For SCSI scanners, the special device name
       must be a generic SCSI device or a symlink to  such  a  device.   Under
       Linux,  such  a device name could be /dev/sga or /dev/sge, for example.
       See sane-scsi(5) for details.

       The contents of the st400.conf file is a list of device names that cor-
       respond  to  Siemens  scanners.   Empty lines and lines starting with a
       hash mark (#) are ignored.  A sample configuration file is shown below:

              # this is a comment

       The default configuration file that is distributed with SANE looks like

              scsi SIEMENS "ST 400" Scanner * * 3 0

       In  this  configuration,  the driver can only access the ST400 model at
       SCSI ID 3 LUN 0 (see section "BUGS" below for the reason).  To use  the
       driver  with  other scanner models, add an appropriate line to the con-
       figuration file.  For example, to use it with an ST800 at SCSI ID 3 LUN
       0, add the line:

              scsi SIEMENS "ST 800" Scanner * * 3 0

              The   backend   configuration  file  (see  also  description  of
              SANE_CONFIG_DIR below).

              The static library implementing this backend.

              The shared library implementing this backend (present on systems
              that support dynamic loading).

              This environment variable specifies the list of directories that
              may contain the configuration file.  Under UNIX, the directories
              are  separated  by a colon (`:'), under OS/2, they are separated
              by a semi-colon (`;').  If this variable is not set, the config-
              uration  file is searched in two default directories: first, the
              current working directory (".") and then in /etc/sane.d.  If the
              value  of the environment variable ends with the directory sepa-
              rator character, then the default directories are searched after
              the  explicitly  specified  directories.   For  example, setting
              SANE_CONFIG_DIR to "/tmp/config:" would  result  in  directories
              "tmp/config", ".", and "/etc/sane.d" being searched (in this or-

              If the library was compiled with debug support enabled, this en-
              vironment  variable  controls  the debug level for this backend.
              E.g., a value of 128 requests all debug output  to  be  printed.
              Smaller levels reduce verbosity.

       Everything but the most basic stuff.

       Currently,  the backend does not check if the attached device really is
       a ST400.  It will happily accept everything that matches the configura-
       tion  entries.  This makes it easy to test the backend with other scan-
       ners: Just add an appropriate line to the configuration file.  The con-
       figuration  file  as distributed (see above) only works with the ST400.
       Be careful: If there is no config file at all, the backend defaults  to

       The ST400 answers on all eight SCSI LUNs.  Normally this is not a prob-
       lem, as LUN support is usually disabled in SCSI drivers, but if you are
       seeing  multiple instances of the scanner in a device list, either dis-
       able LUNs in your SCSI setup or change the entry in  the  configuration
       file to match LUN 0 only.

       If  you  encounter  a  bug please set the environment variable SANE_DE-
       BUG_ST400 to 128 and try to regenerate the problem. Then send me a  re-
       port with the log attached.

       If  you  encounter  a SCSI bus error or trimmed and/or displaced images
       please also set the environment variable SANE_DEBUG_SANEI_SCSI  to  128
       before sending me the report.

       sane(7), sane-scsi(5)

       Ingo Wilken <>

@PACKAGEVERSION@                  14 Jul 2008                    sane-st400(5)
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