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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   /usr/lo-
	      cal/etc/sane.d.	If  the	value of the environment variable ends
	      with the directory separator character, then the default	direc-
	      tories  are searched after the explicitly	specified directories.
	      For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
	      sult in directories tmp/config, ., and /usr/local/etc/sane.d be-
	      ing searched (in this order).

	      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 <>

				  14 Jul 2008			 sane-st400(5)


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