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<TITLE>sane-devel: Re: man page sane-scsi</TITLE>
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<H1>Re: man page sane-scsi</H1>
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<STRONG>From:</STRONG> Douglas Gilbert (<A HREF="mailto:dgilbert@interlog.com?Subject=Re:%20man%20page%20sane-scsi&In-Reply-To=&lt;397FB365.E9729EC7@interlog.com&gt;"><EM>dgilbert@interlog.com</EM></A>)<BR>
<STRONG>Date:</STRONG> Wed Jul 26 2000 - 20:58:29 PDT
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Bob van der Poel wrote:
<BR>
<EM>&gt;
</EM><BR>
<EM>&gt; 1. Just a comment on this page. In the linux section it talks about
</EM><BR>
<EM>&gt; scanners not being turned on at boot/powerup and using the line:
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; echo &quot;scsi add-single-device 2 0 5 0&quot; &gt; /proc/scsi/scsi
</EM><BR>
<P>Works for me. Assuming the aha152x is the only SCSI adapter
<BR>
in your system then that &quot;2&quot; above should be a &quot;0&quot;.
<BR>
<P><EM>&gt; I've not been able to get this to work. However, simply doing something
</EM><BR>
<EM>&gt; like:
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; modprobe /lib/modules/...path to scsi mods/aha152x.o
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; works perfectly. Might want to add this to the docs.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; 2. Now, can someone help with this....I never needed to do the above
</EM><BR>
<EM>&gt; until just recently when I added cd-burner using the pseudo=scsi driver.
</EM><BR>
<EM>&gt; I have the following in my /etc/conf.modules:
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; alias scsi_hostadapter aha152x
</EM><BR>
<EM>&gt; post-install sg modprobe aha152x
</EM><BR>
<EM>&gt; options aha152x aha152x=0x140,9
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; and I'm thinking that I need to change it.
</EM><BR>
<P>Assuming its an IDE cdwriter and you're using the ide-scsi pseudo
<BR>
driver then you shouldn't need to anything with those lines
<BR>
in /etc/conf.modules .
<BR>
<P>You may need to convince the IDE subsystem not to take control
<BR>
of the cd writer. This can be done by:
<BR>
&nbsp;&nbsp;- not building in the ide-cd driver
<BR>
&nbsp;&nbsp;- building in that driver and putting a line like this into lilo:
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;append=&quot;hdb=ide-scsi&quot;
<BR>
&nbsp;&nbsp;- build the ide-cd driver as a module and if it must be loaded
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;(e.g. to control another cd reader) then invoke it like this:
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;modprobe ide-cd ignore=hdb
<BR>
<P>[N.B. In the forthcoming lk 2.4 that append in the second bullet
<BR>
changes to: append=&quot;hdb=scsi&quot; ]
<BR>
<P><EM>&gt; But, I don't see what?? Oh,
</EM><BR>
<EM>&gt; should the 'sg' be changed to the 'sgb' since this is now my scanner
</EM><BR>
<EM>&gt; device? I really don't understand this entire sg* stuff...I was under
</EM><BR>
<EM>&gt; the impression that the whole works was supposed to be dynamic, but here
</EM><BR>
<EM>&gt; I am still manually setting things up. Had to set the cdrom to use
</EM><BR>
<EM>&gt; 'sga'...
</EM><BR>
<P>No, don't change 'sg' to 'sgb'
<BR>
<P>Look at the output of 'cat /proc/scsi/scsi'. The order that devices
<BR>
appear there is the same order sg allocates device numbers (i.e.
<BR>
sg0, sg1 ...) or the now deprecated driver letters (i.e. sga, sgb ...).
<BR>
If the ide-scsi and aha152x drivers are modules (which seems to
<BR>
be the case) then by controlling the order of the module loads
<BR>
then you will control which device is sg0 and sg1 .
<BR>
<P>Clear?
<BR>
<P>Doug Gilbert
<BR>
<P><PRE>
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