sane-project-website/old-archive/1998-04/0025.html

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<!-- name="Rogier Wolff" -->
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<!-- subject="Re: Sane patches/observations on solaris 2.6/umax s6-e" -->
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<title>sane-devel: Re: Sane patches/observations on solaris 2.6/umax s6-e</title>
<h1>Re: Sane patches/observations on solaris 2.6/umax s6-e</h1>
<b>Rogier Wolff</b> (<a href="mailto:R.E.Wolff@BitWizard.nl"><i>R.E.Wolff@BitWizard.nl</i></a>)<br>
<i>Fri, 3 Apr 1998 08:15:57 +0200 (MET DST)</i>
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Hugo van der Kooij wrote:<br>
<i>&gt; </i><br>
<i>&gt; On Thu, 2 Apr 1998, Michael Polo wrote:</i><br>
<p>
<i>&gt; &gt; By the way, on large scans, the scanner seems to back up. Is</i><br>
<i>&gt; &gt; there a buffer size to change somewhere to make it scan in one</i><br>
<i>&gt; &gt; pass without pausing? I have 128Mb of memory and I thought if</i><br>
<i>&gt; &gt; the scsi bus could keep up, the system could. Any ideas?</i><br>
<i>&gt; </i><br>
<i>&gt; I do suspect that this is related to the scanner. I have a HP Scanjet 5p</i><br>
<i>&gt; And even when the system is busy I don't have this backup behaviour of the</i><br>
<i>&gt; scanner. It scan in one smooth motion.</i><br>
<p>
My "guess" was that if the system could issue the next read command<br>
within the right timelimit, the scanner would be able to keep on<br>
going. However, whatever I do, my scanner will backtrack on every<br>
"read" that is issued.<br>
<p>
It seems that the scanner doesn't "multitask" very well. It should<br>
internally keep on scanning, until it runs out of buffer space, not<br>
stop once it has satisfied the current "read" command.<br>
<p>
On Linux we have the source to the generic scsi driver, and there are<br>
patches to increase the buffer size, allowing you larger "read"<br>
commands. Wether that's possible on your sun, I can't say.<br>
<p>
I'm talking about the Tamarack. But is not valid for HPs as Hugo says,<br>
but probably is for Musteks.<br>
<p>
<p>
Roger. <br>
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