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From: bob@obiwan.pmr.com (Bob Willcox)
Subject: Re: aic7xxx Adapter support
To: gibbs@estienne.CS.Berkeley.EDU (Justin T. Gibbs)
Date: Fri, 28 Apr 1995 08:56:25 -0500 (CDT)
Cc: current@FreeBSD.org
In-Reply-To: <199504271851.LAA03949@estienne.cs.berkeley.edu> from "Justin T. Gibbs" at Apr 27, 95 11:51:14 am
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Justin T. Gibbs wrote:
> 
> I just commited a sweeping change to the aic7xxx sequencer code.  This
> should fix the "device busy" problems that were reported with micropolis
> drives as well as make the card respect devices that win arbitration
> (there were cases that it would miss seeing the sucessful arbitration
> of another device and force re-arbitration - yuck!).  The changes were
> tested on wcarchive which has drives from seagate, quantum and micropolis,
> so its hoped that this wont break anything, but if it does, I'd like
> to hear about it before 2.0.5 is released.  So, if you use one of these
> cards, please try out the new driver.

Justin, I tried the latest kernel (from this mornings CTM) on my 2740
and Exabyte 8200 tape drive.  I dumped one of my filesystems to the tape
and everything was going fine till it got all done and rewound the tape.
At that point I go the following sequence of messages on the console,
followed by a system hang (no panic, just hang):

ahc0: Target Busy
ahc0: Target 6, lun0 (st2) timed out
ahc0: Target 6, lun0 (st2) timed out
ahc0: Target 6, lun0 (st2) timed out
ahc0: Target 6, lun0 (st2) timed out

Thought you'd like to know.  Let me know if there is anything I can
do to help track it down.

Note the tape did in fact successfully rewind and the drive allowed me
to remove it (whilst the system was hung).

-- 
Bob Willcox
bob@obiwan.pmr.com (or obiwan%bob@uunet.uu.net)
Austin, TX