sane-project-website/old-archive/1999-06/0096.html

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<!-- name="Wolfgang Goeller" -->
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<title>sane-devel: Re: Artec AT6 yet again</title>
<h1>Re: Artec AT6 yet again</h1>
<b>Wolfgang Goeller</b> (<a href="mailto:wgoeller@active.ch"><i>wgoeller@active.ch</i></a>)<br>
<i>Thu, 17 Jun 1999 09:32:50 +0200</i>
<p>
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"Brian B." wrote:<br>
<p>
<i>&gt; &gt; &gt; Attached devices:</i><br>
<i>&gt; &gt; &gt; Host: scsi0 Channel: 00 Id: 01 Lun: 00</i><br>
<i>&gt; </i><br>
<i>&gt; Im assuming that you are speaking of some config program from RH but I run</i><br>
<i>&gt; debian do I doubt I would have it. So is there anyway you could tell me how to</i><br>
<i>&gt; do it by hand Im assuming echo add-single-device 0 0 2 0 &gt; /proc/scsi/scsi</i><br>
<i>&gt; but Im not sure if thats right or if its even the right command string.</i><br>
<i>&gt; </i><br>
<i>&gt; BTW the lun switch is set to 3 on the back of my scanner. not sure if that</i><br>
<i>&gt; makes a difference.</i><br>
<p>
Well, that's a good hint - I actually don't mean any Red Heat<br>
progs.<br>
<p>
ID=01 means: Your scanner is still supposed to be at<br>
      lun 1.<br>
I did not explain it very well:<br>
ID represents what your manual regards as LUN.<br>
 Let me explain it with an example:<br>
 I've got a Phase-change-drive, this drive is jumpered to LUN 3.<br>
 But since this drive can act as CD-Reader and as PD-disk-writer<br>
 it has to "sub-luns" - 1 and 2.<br>
So linux reports<br>
ID 03 Lun 01 as CD-Reader<br>
ID 03 Lun 02 as Writer<br>
<p>
OR say you have an external SCSI-Drive-array with its own controller<br>
that connects to your controller.<br>
The whole bunch of disks might be say 1 - but it has several different<br>
disks.<br>
That might result in a report like the following:<br>
ID 01 Lun 01 IBM disk ......<br>
ID 01 Lun 02 Quantum disk ....<br>
<p>
Now you have your Scanner set to ID 3<br>
If linux does not find it there it will not work.<br>
Might be after changing the ID you might want to<br>
power off the Scanner and the computer.<br>
After restarting both you should get "ID=3" for your scanner.<br>
Unless the actual settings of the scanner and what linux finds<br>
when reporting devices are identical, nothing will work.<br>
<p>
The manual adding of a device is only for the case, when the<br>
Scanner was offline (or switched off) during boot-time, then he<br>
is not recognized by the system.<br>
<p>
I would avoid the "add-single-device...." if ever possible.<br>
After I'm sure everything works well I would compile the<br>
SCSI-interface as module. Removing that module and reinstalling<br>
it is a better way to make things work.<br>
<p>
And: It might well make a difference, what ID your Scanner has.<br>
<p>
When you boot your System the SCSI-Controller reports in most<br>
cases "PRESS CTRL-A (or press CTRL-B or press CTRL-S)" for <br>
configuration. That allows you to set some parameters for<br>
your Controller and the way it negotiates with attached devices.<br>
<p>
Hope I could clarify things. If not (my English is not too good)<br>
pleas ask.<br>
<p>
Regards<br>
Wolfgang<br>
<p>
<pre>
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</pre>
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<p>
<ul>
<!-- next="start" -->
<li> <b>Next message:</b> <a href="0097.html">Michele Bini: "Re: [PARPORT] BETA test, new ppSCSI drivers"</a>
<li> <b>Previous message:</b> <a href="0095.html">Warren: "Re: Request for more info on Obscure Scanner"</a>
<li> <b>Maybe in reply to:</b> <a href="0083.html">Brian B.: "Artec AT6 yet again"</a>
<!-- nextthread="start" -->
<li> <b>Next in thread:</b> <a href="0136.html">Wolfgang Goeller: "Re: Artec AT6 yet again"</a>
<!-- reply="end" -->
</ul>