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

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

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

               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 revision to
 Have a look at
          subscription to sane-devel.

          This backend expects device names of the form:


          Where special is either the path-name for the special device
          that corresponds to a SCSI scanner. For SCSI scanners, the
          special device name must be a generic SCSI device or a sym-
          link 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 correspond 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 this:

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

               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 configuration 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 direc-
               tories 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 configuration 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 direc-
               tory separator character, then the default directories
               are searched after the explicitly specified directo-
               ries.  For example, setting SANE_CONFIG_DIR to
               "/tmp/config:" would result in directories tmp/config,
               ., and /etc/sane.d being searched (in this order).

               If the library was compiled with debug support enabled,
               this environment 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

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

          really is a ST400.  It will happily accept everything that
          matches the configuration entries.  This makes it easy to
          test the backend with other scanners: Just add an appropri-
          ate line to the configuration file.  The configuration file
          as distributed (see above) only works with the ST400.  Be
          careful: If there is no config file at all, the backend
          defaults to /dev/scanner.

          The ST400 answers on all eight SCSI LUNs.  Normally this is
          not a problem, as LUN support is usually disabled in SCSI
          drivers, but if you are seeing multiple instances of the
          scanner in a device list, either disable 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_DEBUG_ST400 to 128 and try to regenerate the problem.
          Then send me a report with the log attached.

          If you encounter a SCSI bus error or trimmed and/or dis-
          placed 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 <>

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