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To: jdli@csie.nctu.edu.tw (Chien-Ta Lee)
cc: freebsd-current@freebsd.org
Subject: Re: AHA2940 Tag Queueing Problem... 
In-reply-to: Your message of "Tue, 22 Aug 95 18:10:42 +0800."
             <199508221011.SAA09279@phoenix.csie.nctu.edu.tw> 
Date: Tue, 22 Aug 1995 07:44:42 -0700
From: "Justin T. Gibbs" <gibbs@freefall.FreeBSD.org>
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>
>	Hi :
>	
>	I tried to enable AHC_TAGENABLE on FreeBSD-2.2-CURRENT-950820,
>	but still failed as 2.0.5-RELEASE...
>	May anyone help me or tell me how to provide debug informations ?
>
>(ahc0:0:0): "IBM DPES-31080 S31K" type 0 fixed SCSI 2
>sd0(ahc0:0:0): Direct-Access ahc0:A:0: Warning - message rejected by target: 0
>x20
>ahc0:A:0: Tagged message rejected. Disabling tagged commands for this target
>ahc0: board not responding

This drive is basically broken when it comes to tagged queuing.  I would
suggest calling IBM and seeing if they have a firmware upgrade for it.
As your dmesg showed, the target goes "out to lunch" when you send a 
tagged message to it. :(

>--
>                                                  李 建 達  (Adonis) 交大資工
>                                                  Mail: jdli@csie.nctu.edu.tw

--
Justin T. Gibbs
===========================================
  Software Developer - Walnut Creek CDROM
  FreeBSD: Turning PCs into workstations
===========================================