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<TITLE>sane-devel: Re: HP backend problem...</TITLE>
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<META NAME="Author" CONTENT="abel deuring (a.deuring@satzbau-gmbh.de)">
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<META NAME="Subject" CONTENT="Re: HP backend problem...">
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<H1>Re: HP backend problem...</H1>
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<!-- received="Thu Aug 24 07:30:16 2000" -->
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<!-- sent="Thu, 24 Aug 2000 16:47:26 +0200" -->
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<!-- name="abel deuring" -->
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<!-- subject="Re: HP backend problem..." -->
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<STRONG>From:</STRONG> abel deuring (<A HREF="mailto:a.deuring@satzbau-gmbh.de?Subject=Re:%20HP%20backend%20problem...&In-Reply-To=<39A5357E.A54A3F24@satzbau-gmbh.de>"><EM>a.deuring@satzbau-gmbh.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Thu Aug 24 2000 - 07:47:26 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0219.html">D Milburn: "2.4.0-testX"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0217.html">Jens Petersohn: "Re: HP backend problem..."</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0217.html">Jens Petersohn: "Re: HP backend problem..."</A>
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<HR NOSHADE><P>
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<P>
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Jens Petersohn wrote:
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<BR>
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<EM>>
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > Well it was a miracle it worked in the first place!
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</EM><BR>
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<EM>> > 1) Linux thinks it is the only initiator on a SCSI bus
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</EM><BR>
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<EM>> > 2) W95 + W98 most likely make the same assumption
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</EM><BR>
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<EM>> > 3) The SCSI scanners I've played with have particularly
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</EM><BR>
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<EM>> > bad target implementations prone to lock up at the
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</EM><BR>
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<EM>> > first sign of an irregularity.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Yes and no (to 1 and 2). Nothing in SCSI necessarily precludes
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</EM><BR>
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<EM>> you from having several initiators on the same bus, provided
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</EM><BR>
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<EM>> that that the ID and termination rules are obeyed. Wether the
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</EM><BR>
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<EM>> firmware on the target can handle this situation is an entirely
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</EM><BR>
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<EM>> different issue.
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</EM><BR>
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<P>Agreed. And to ensure conflict-free access to a device, the SCSI
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<BR>
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commands "Reserve Unit" and "Release Unit" can be used, if they are
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<BR>
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supported. (Ok, I must admit that I'm writing "pure theoy" -- I didn't
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<BR>
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use them in the Sharp backend...)
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<BR>
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<P>Abel
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<BR>
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<P><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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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20HP%20backend%20problem...&In-Reply-To=<39A5357E.A54A3F24@satzbau-gmbh.de>">majordomo@mostang.com</A>
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</PRE>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Thu Aug 24 2000 - 07:31:11 PDT</EM>
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