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73 wiersze
3.4 KiB
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<!-- received="Tue Dec 9 19:10:33 1997 PST" -->
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<!-- name="becka@rz.uni-duesseldorf.de" -->
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<!-- subject="Re: Two SCSI bus question..." -->
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<!-- id="m0xfabc-0000Z6C@charon.beck-sw.de" -->
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<!-- inreplyto="199712092057.PAA00317@prospero.dma.isg.mot.com" -->
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<title>sane-devel: Re: Two SCSI bus question...</title>
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<h1>Re: Two SCSI bus question...</h1>
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<a href="mailto:becka@rz.uni-duesseldorf.de"><i>becka@rz.uni-duesseldorf.de</i></a><br>
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<i>Wed, 10 Dec 1997 02:06:28 +0100 (MET)</i>
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<p>
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<li> <b>Messages sorted by:</b> <a href="date.html#56">[ date ]</a><a href="index.html#56">[ thread ]</a><a href="subject.html#56">[ subject ]</a><a href="author.html#56">[ author ]</a>
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<li> <b>Next message:</b> <a href="0057.html">Warren Early: "Re: microtek scanmaker III,V,VI,A3 etcetera"</a>
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<li> <b>Previous message:</b> <a href="0055.html">borm: "Re: microtek scanmaker III,V,VI,A3 etcetera"</a>
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<li> <b>In reply to:</b> <a href="0051.html">Christoph Doerbeck: "Re: Two SCSI bus question..."</a>
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<li> <b>Next in thread:</b> <a href="0058.html">Rogier Wolff: "Re: Two SCSI bus question..."</a>
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<i>> > All detected devices are assigned a raw-device in the order in which they </i><br>
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<i>> > are detected. Scanning the busses goes dev-id first, then bus-id.</i><br>
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<i>> > </i><br>
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<i>> > Thus you first get all devices on the first bus, then all on the second,</i><br>
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<i>> > each in order of the SCSI IDs.</i><br>
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<i>> > </i><br>
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<i>> > Thus your scanner wanders whenever a device that is below it in that ordering</i><br>
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<i>> > scheme is there or not.</i><br>
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<i>> > </i><br>
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<p>
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<i>> But, let's say I have disk 1 (id=0), disk 2 (id=1), tape drive (id=2) and disk</i><br>
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<i>> 3 (id =3). Isn't disk 3 always /dev/sdc regardless if the tape drive powered</i><br>
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<i>> up?</i><br>
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Yes, because the type is no disk. sd=Scsi Disk.<br>
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<p>
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<i>> Shouldn't the scanner device behave the same way???? :-(</i><br>
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/dev/sg* are sg=Scsi Generic.<br>
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<p>
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All devices get one. Thus all devices are important for the order.<br>
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For disks only disks are important, for tapes only tapes, for cdrom only <br>
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cdroms, but generic counts them all.<br>
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<p>
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<i>> Maybe I'll just revert to the old ways of compiling device entries into the</i><br>
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<i>> kernel. </i><br>
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<p>
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How about a small script and /proc/scsi/scsi ?<br>
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<p>
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CU,Andy<br>
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<p>
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<pre>
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--
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Andreas Beck | Email : <<a href="mailto:becka@sunserver1.rz.uni-duesseldorf.de">becka@sunserver1.rz.uni-duesseldorf.de</a>>
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<p>
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<pre>
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--
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Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0057.html">Warren Early: "Re: microtek scanmaker III,V,VI,A3 etcetera"</a>
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<li> <b>Previous message:</b> <a href="0055.html">borm: "Re: microtek scanmaker III,V,VI,A3 etcetera"</a>
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<li> <b>In reply to:</b> <a href="0051.html">Christoph Doerbeck: "Re: Two SCSI bus question..."</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0058.html">Rogier Wolff: "Re: Two SCSI bus question..."</a>
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<!-- reply="end" -->
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</ul>
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