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<!-- subject="Re: Rebop: Microtek V300" -->
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<title>sane-devel: Re: Rebop: Microtek V300</title>
<h1>Re: Rebop: Microtek V300</h1>
<b>Manfred Lemke</b> (<a href="mailto:ukpr@rz.uni-karlsruhe.de"><i>ukpr@rz.uni-karlsruhe.de</i></a>)<br>
<i>Fri, 18 Sep 1998 23:31:21 +0200 (CES)</i>
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According to Mike D.:<br>
<i>&gt; </i><br>
<i>&gt; As I'm sitting here at work, I realize I have another question.</i><br>
<i>&gt; I have seen and read of references to linking /dev/sg* to</i><br>
<i>&gt; /dev/scanner. After looking in my /dev directory, I notice that</i><br>
<i>&gt; there are devices for sga through sge.</i><br>
<i>&gt; </i><br>
<i>&gt; So, which of those devices needs to be linked. I have, to</i><br>
<i>&gt; this point only tried /dev/sga. When I get home I'll try the</i><br>
<i>&gt; others, I guess. If this is in a FAQ or a manpage somewhere,</i><br>
<i>&gt; I guess I missed it entirely.</i><br>
<p>
The /dev/sg? devices are the so-called "generic" SCSI devices<br>
and programs use them to send specific, non-standard commands<br>
to those SCSI devices.<br>
<p>
To activate those devices, you have to have "Generic SCSI<br>
support" compiled into your kernel.<br>
<p>
Afterwards, the devices are mapped to the generic SCSI devices<br>
in their order of recognition, i.e. usually sorted by SCSI ID.<br>
A "dmesg" will usually give you a hint about which physical<br>
device is linked to which generic device.<br>
<p>
As an example:<br>
<p>
If you have three SCSI devices with the following parameters:<br>
<p>
ID 0: harddisk<br>
ID 2: CD ROM<br>
ID 6: scanner<br>
<p>
Then the harddisk would be /dev/sga, the cd-rom would be /dev/sgb<br>
and the scanner would be /dev/sgc.<br>
<p>
As a side note, those "generic SCSI devices" are also used to<br>
properly access CD-ROM writers and other such "unusual" devices.<br>
<p>
Hope this helped you a bit,<br>
<p>
Manfred Lemke (<a href="mailto:ukpr@rz.uni-karlsruhe.de">ukpr@rz.uni-karlsruhe.de</a>)<br>
<p>
P.S.: Can anyone tell me how to contact the SANE developer team<br>
for the Mustek backend? My scanner has a firmware release that's<br>
not included in the "working" sections, but it almost works<br>
(see my previous posting).<br>
<p>
<p>
<pre>
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