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<H1>Re: SCSI Cable and separate Controller</H1>
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<STRONG>From:</STRONG> Wolfgang Goeller (<A HREF="mailto:wgoeller@active.ch?Subject=Re:%20SCSI%20Cable%20and%20separate%20Controller&In-Reply-To=&lt;38A81665.AC9BEDF2@active.ch&gt;"><EM>wgoeller@active.ch</EM></A>)<BR>
<STRONG>Date:</STRONG> Mon Feb 14 2000 - 06:51:17 PST
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Andrew McHorney wrote:
<BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Well I can get a simple 4 to 6 scsi foot cable for now. When I get my
</EM><BR>
<EM>&gt; computer desk setup, the scanner will be located much closer and then I can
</EM><BR>
<EM>&gt; use a 3 foot cable.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; The scanner came with an adaptec controller which is ok, but I would rather
</EM><BR>
<EM>&gt; not waste a slot.
</EM><BR>
<P>Just think of some facts:
<BR>
<P>- As long as the scanner transfers (slowly) data,
<BR>
&nbsp;&nbsp;the scsi-bus might be occupied for other activities
<BR>
&nbsp;&nbsp;That might be OK, as long as only chunks of data are
<BR>
&nbsp;&nbsp;transfered. But:
<BR>
- Some scanners block the SCSI-Bus totally, as long as
<BR>
&nbsp;&nbsp;they are busy - and that will slow down you machine
<BR>
&nbsp;&nbsp;in a way you might not want.
<BR>
- Most Scanners are poorly terminated. At the best
<BR>
&nbsp;&nbsp;it's a reasonable passive termination. That's not
<BR>
&nbsp;&nbsp;adaequate for high-speed SCSI-Controllers.
<BR>
<P>Therefor it's save and a good idea to have a separate
<BR>
controller for all this slow devices.
<BR>
<P>Regards
<BR>
Wolfgang
<BR>
<P><PRE>
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