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<H1>Re: SCSI Cable (Some comments and questions)</H1>
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<STRONG>From:</STRONG> Oliver Rauch (<A HREF="mailto:oliver.rauch@Wolfsburg.DE?Subject=Re:%20SCSI%20Cable%20(Some%20comments%20and%20questions)&In-Reply-To=&lt;38A87B26.6F90D9A6@wolfsburg.de&gt;"><EM>oliver.rauch@Wolfsburg.DE</EM></A>)<BR>
<STRONG>Date:</STRONG> Mon Feb 14 2000 - 14:01:10 PST
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mendes wrote:
<BR>
<P><EM>&gt; Hello
</EM><BR>
<EM>&gt; I have just seen the discussion on the list about SCSI Cable. Although
</EM><BR>
<EM>&gt; I am not an expert I find the solution of having different cards from scanners
</EM><BR>
<EM>&gt; and disks a good solution. In my setup I had to move the HP Scanjet (Oliver, I
</EM><BR>
<EM>&gt; am not using my old Umax T-630, I gave up trying to upgrade the bios) to an
</EM><BR>
<EM>&gt; adaptec 2906 and my other devices to a TEKRAM 390F. Only in this way I've got
</EM><BR>
<EM>&gt; the scanner working ok. Before that the scanner messed up the whole scsi bus.
</EM><BR>
<EM>&gt; Please note that TEKRAM 390F doesn't have an external 50 pin so I had
</EM><BR>
<EM>&gt; to buy a 50M-50F and attach to the scsi cable in order to have a &quot;fake&quot; 50F
</EM><BR>
<EM>&gt; external connector. It worked, but as I said the scsi bus went crazy.
</EM><BR>
<EM>&gt; Question: How does this TERMINATION (passive or active???) works? Does
</EM><BR>
<EM>&gt; Scanjet need ones? I am clueless....
</EM><BR>
<EM>&gt;
</EM><BR>
<P>Both ends of the scsi chain HAVE TO BE termiated.
<BR>
<P>Passive termination is done with resistors, active termination is done with
<BR>
transistors/opamps.
<BR>
<P>If there is only the scanner connected on the scsi bus you may try without termination,
<BR>
if you have a scsi disk connected you may loose your filesystem if you try without correct termination.
<BR>
<P>Bye
<BR>
Oliver
<BR>
<P><PRE>
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