From owner-freebsd-scsi Wed May 13 12:40:30 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA00258 for freebsd-scsi-outgoing; Wed, 13 May 1998 12:40:30 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from pluto.plutotech.com (mail.plutotech.com [206.168.67.137]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA00253 for ; Wed, 13 May 1998 12:40:25 -0700 (PDT) (envelope-from gibbs@plutotech.com) Received: from narnia.plutotech.com (narnia.plutotech.com [206.168.67.130]) by pluto.plutotech.com (8.8.7/8.8.5) with ESMTP id NAA19928; Wed, 13 May 1998 13:40:20 -0600 (MDT) Message-Id: <199805131940.NAA19928@pluto.plutotech.com> X-Mailer: exmh version 2.0.1 12/23/97 To: fireston@lexmark.com cc: gibbs@plutotech.com (Justin T. Gibbs), freebsd-scsi@FreeBSD.ORG (SCSI FreeBSD) Subject: Re: SCSI timeouts in dataout mode In-reply-to: Your message of "Wed, 13 May 1998 15:37:30 EDT." <199805131937.AA01770@interlock2.lexmark.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 13 May 1998 13:36:34 -0600 From: "Justin T. Gibbs" Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org >How bizarre, how bizarre. > >We tried many things, including the hacks to scsi_da.c as suggested. No help >there. > >Having reached the point of pure perversity, we by chance turned the >Disconnect option off in the Adaptec BIOS. And things started working and >working well - we bonnie'd a 512MB file without a problem. > >Why? Because you effectively prevented the Adaptec from using tagged queuing. Look at your dmesg output. It won't report "Tagged Queuing Device" for your array. Can you send me a SCSI bus trace? CAM will really pound that array, and it wouldn't be the first time that FreeBSD exposed bugs in an array. >-- >Mik Firestone fireston@lexmark.com >If ever I become an Evil Overlord: >My legions of terror will have helmets with clear plexiglass visors, not >face-concealing ones. > -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message