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Date:      Thu, 13 Jul 1995 02:19:02 -0500 (CDT)
From:      Mike Pritchard <mpp@legarto.minn.net>
To:        terry@cs.weber.edu (Terry Lambert)
Cc:        tom@misery.sdf.com, karl@Mcs.Net, rgrimes@gndrsh.aac.dev.com, freebsd-hackers@FreeBSD.ORG
Subject:   Re: SCSI disk wedge
Message-ID:  <199507130719.CAA02184@mpp>
In-Reply-To: <9507130522.AA22828@cs.weber.edu> from "Terry Lambert" at Jul 12, 95 11:22:01 pm

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> > The 1742 driver has been around for a long time and is very similar to 
> > the driver in NetBSD.  However, the 2742/2842/2942 driver is quite 
> > recent.  It is _very_ odd that you have problems with both adapters.
> 
> Clearly, it is an issue of tagged command queuing, very large transfers,
> bus on time, or one of the many issues in the shared SCSI, VM, block I/O,
> and/or user space code above them all, only the last of which is shared
> with BSDI (and therefore possible to rule out).
> 					Terry Lambert
> 					terry@cs.weber.edu

Just to toss my $0.02 in, I don't think I would blame any tagged
queuing problems on the 27/28/2942 driver anymore.  You have
to explicitly enable that via a #define right now.  I've also
been running for around 4 - 6 weeks with tagged queuing enabled 
using one of the "problem" drives with absolutely no problems.

Now if the guy enabled it and was having problems.......
-- 
Mike Pritchard
mpp@legarto.minn.net
"Go that way.  Really fast.  If something gets in your way, turn"



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