Man Linux: Main Page and Category List


       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
       compatibles.   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
       revision  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
       corresponds  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
       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

              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 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
              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  directory separator 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 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 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 appropriate 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  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 <>

                                  14 Jul 2008                    sane-st400(5)