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<!-- name="Meino Christian Cramer" -->
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<!-- subject="Re: SCSI-bus confusing with AVISION AV630CS/TEKRAM DC390F" -->
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<title>sane-devel: Re: SCSI-bus confusing with AVISION AV630CS/TEKRAM DC390F</title>
<h1>Re: SCSI-bus confusing with AVISION AV630CS/TEKRAM DC390F</h1>
<b>Meino Christian Cramer</b> (<a href="mailto:root@solfire.ludwigsburg.netsurf.de"><i>root@solfire.ludwigsburg.netsurf.de</i></a>)<br>
<i>Wed, 23 Jun 1999 02:22:26 GMT</i>
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From: Nick Lamb &lt;<a href="mailto:njl98r@ecs.soton.ac.uk">njl98r@ecs.soton.ac.uk</a>&gt;<br>
Subject: Re: SCSI-bus confusing with AVISION AV630CS/TEKRAM DC390F<br>
Date: Tue, 22 Jun 1999 21:29:18 +0100 (GMT)<br>
Message-ID: &lt;<a href="mailto:Pine.LNX.4.10.9906222124040.16312-100000@chef.ecs.soton.ac.uk">Pine.LNX.4.10.9906222124040.16312-100000@chef.ecs.soton.ac.uk</a>&gt;<br>
<p>
Hi Nick!<br>
<p>
Thank you for your fast reply ! :-)<br>
<p>
<i>&gt; On Tue, 22 Jun 1999, Meino Christian Cramer wrote:</i><br>
<i>&gt; </i><br>
<i>&gt; &gt; Does anyone out there knows about some things I could try</i><br>
<i>&gt; &gt; to avoid those dead-scans?</i><br>
<i>&gt; </i><br>
<i>&gt; Well, to at least avoid killing the Linux box you should check out</i><br>
<i>&gt; </i><br>
<i>&gt; (1) SCSI may become happy again if you turn off the scanner when it hangs</i><br>
<br>
Unfortunately it does not. I unplugged the scanner ... nothing.<br>
I tried to leave X ... the screen blanks (the X-server end) but<br>
I received a black screen, cause any access to the disk was blocked. <br>
I tried to shutdown the "official" way ... no chance: the "shutdown"-<br>
programm could not be loaded: disk blcoked. SySREQs also does not work.<br>
Hardreset recalls the box ittself -- but the disk remains blocked so<br>
the BIOS reports "disk access failure". Only after physically cycle power,<br>
the block was ended -- sigh.<br>
<br>
<p>
<i>&gt; You will see a lot of screaming from the kernel "Where did that go????"</i><br>
<i>&gt; but then it should settle down and you can reboot safely</i><br>
<i>&gt; </i><br>
<i>&gt; (2) Magic SysRq is your friend, in 2.2.x at least you can configure the</i><br>
<i>&gt; Alt+SysRq sequence on and have a keypress which syncs and reboots to</i><br>
<i>&gt; avoid file corruption. Check out the appropriate kernel files.</i><br>
<p>
Yes, it is activated since -- I don't know. But it was inaccessible after<br>
the scsi-block. See above.<br>
<p>
<i>&gt; </i><br>
<i>&gt; AFAIK the SCSI mid-layer of Linux is unhelpful about reporting errors</i><br>
<i>&gt; such as "You sent too much/ not enough/ wrong kind of data" to upper</i><br>
<i>&gt; layers such as SCSI generic. Tinkering with mid-layer endangers SCSI</i><br>
<i>&gt; disks, tape backups etc. and only benefits SCSI generic users. So it</i><br>
<i>&gt; won't happen for a while yet.</i><br>
<p>
Do you have any hint,or trick, what I have to chance in the backend?<br>
What do I have done wrong there? In short: I done a INQUIRY, then<br>
SET-WINDOW, START-SCAN and a READ-loop, which does not loop, cause<br>
the block happens then.....<br>
<p>
<p>
<i>&gt; Nick.</i><br>
<i>&gt; </i><br>
<i>&gt; </i><br>
<i>&gt; --</i><br>
<i>&gt; Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a></i><br>
<i>&gt; To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a></i><br>
<i>&gt; </i><br>
<p>
Thank you very much in advance!<br>
<p>
KEEP HACKING!<br>
Meino<br>
<p>
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