From owner-freebsd-bugs  Tue Dec 24 02:41:49 1996
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Date: Tue, 24 Dec 1996 02:41:40 -0800 (PST)
From: Joerg Wunsch <joerg>
Message-Id: <199612241041.CAA17733@freefall.freebsd.org>
To: andreas@klemm.gtn.com, joerg, freebsd-bugs, gibbs
Subject: Re: kern/1989
Sender: owner-bugs@FreeBSD.ORG
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Synopsis: dump(8) fails to dump if tagged command queuing is enabled

State-Changed-From-To: feedback-open
State-Changed-By: joerg
State-Changed-When: Tue Dec 24 11:40:42 MET 1996
State-Changed-Why: 
> Please confirm: does the problem still exist with the recent driver?

The problems still arises in -current.
Exactly this I tried yesterday with a brand new kernel.
Only one thing changed. The error message:

sd0(ahc0:0:0) Tagged openings reduced to 3

This message comes up - nothing more - and the system hangs.
This happens only with tagged command queuing enabled.
With or without the compile option AHC_SCBPAGING_ENABLE.

When using tar as backup tool, this doesn't happen. Or when benching
SCSI disks using bonnie. 



Responsible-Changed-From-To: freebsd-bugs->gibbs
Responsible-Changed-By: joerg
Responsible-Changed-When: Tue Dec 24 11:40:42 MET 1996
Responsible-Changed-Why: 
Seems like Justin's area.