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<H1>Re: Correct Network Scanner Syntax? (a question)</H1>
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<STRONG>From:</STRONG> John Fremlin (<A HREF="mailto:vii@penguinpowered.com?Subject=Re:%20Correct%20Network%20Scanner%20Syntax?%20(a%20question)&In-Reply-To=&lt;m2hfbjptqy.fsf@boreas.southchinaseas&gt;"><EM>vii@penguinpowered.com</EM></A>)<BR>
<STRONG>Date:</STRONG> Sat May 27 2000 - 14:29:09 PDT
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abel deuring &lt;<A HREF="mailto:a.deuring@satzbau-gmbh.de?Subject=Re:%20Correct%20Network%20Scanner%20Syntax?%20(a%20question)&In-Reply-To=&lt;m2hfbjptqy.fsf@boreas.southchinaseas&gt;">a.deuring@satzbau-gmbh.de</A>&gt; writes:
<BR>
<P><EM>&gt; &gt; Hmm. I don't know if Oliver added anything to my version, but here is
</EM><BR>
<EM>&gt; &gt; what I sent him (relative to sane-cvs). The patch to
</EM><BR>
<EM>&gt; &gt; sanei/sanei_scsi.c should not be necessary if sane is setup properly,
</EM><BR>
<EM>&gt; &gt; and is probably incorrect wrt other sane backends.
</EM><BR>
<P>[...]
<BR>
<P><EM>&gt; If this patch to sanei_scsi.c works for your setup (Microtek USB
</EM><BR>
<EM>&gt; scanner, if my memory is right), it's fine. But it might break the
</EM><BR>
<EM>&gt; memory management for other backends which use the function
</EM><BR>
<EM>&gt; sanei_scsi_open. Most backends open the device file for scanner access
</EM><BR>
<P>To clarify:
<BR>
<P>The patch is *only* included because I couldn't be bothered to read
<BR>
the docs to find the correct fix for the fact that my kernel sg buffer
<BR>
size is smaller than that which SANE expects.
<BR>
<P>I suppose that the USB scanner will work OK with any SCSI buffer size,
<BR>
though this is untested and the blighters at microtek can't be
<BR>
bothered to give us the docs, and Oliver can't get it to work at all
<BR>
on his setup, so whether they work on any system except mine is open
<BR>
to question. ;-)
<BR>
<P>[...]
<BR>
<P><EM>&gt; Therefore, it would be better to work with the environment variable
</EM><BR>
<EM>&gt; SANE_SG_BUFFERSIZE, or to use the configure-option
</EM><BR>
<EM>&gt; --enable-scsibuffersize.
</EM><BR>
<P>[...]
<BR>
<P><EM>&gt; To remove this conflict, I suggest to use sanei_scsi_open_extended
</EM><BR>
<EM>&gt; instead of sanei_scsi_open in those backends which support USB
</EM><BR>
<EM>&gt; scanners. Practically, this means to get rid of
</EM><BR>
<P>I don't understand. The Microtek Scanmaker X6 USB scanner takes SCSI
<BR>
commands over the USB bus. Oliver Neukum and I wrote a kernel driver
<BR>
to pass SCSI commands to the scanner. Pure USB scanners would
<BR>
presumably not bother with SCSI at all.
<BR>
<P>My changes to sanei scsi were just to workaround my misconfigured
<BR>
SANE/kernel combo; they have nothing to do with any known hardware
<BR>
limitation.
<BR>
<P>[...]
<BR>
<P>However, could my patch to microtek2.c be integrated into CVS or at
<BR>
least undergo some testing by people with true SCSI scanners? I
<BR>
believe it should be correct.
<BR>
<P><PRE>
--
<P> <A HREF="http://altern.org/vii">http://altern.org/vii</A>
<P>--
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