From owner-freebsd-scsi Fri Dec 5 22:30:50 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id WAA23502 for freebsd-scsi-outgoing; Fri, 5 Dec 1997 22:30:50 -0800 (PST) (envelope-from owner-freebsd-scsi) Received: from pluto.plutotech.com (mail.plutotech.com [206.168.67.137]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id WAA23495 for ; Fri, 5 Dec 1997 22:30:47 -0800 (PST) (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 XAA03061; Fri, 5 Dec 1997 23:30:41 -0700 (MST) Message-Id: <199712060630.XAA03061@pluto.plutotech.com> To: Joao Carlos Mendes Luis cc: gibbs@plutotech.com (Justin T. Gibbs), freebsd-scsi@freebsd.org Subject: Re: AHC optimizations In-reply-to: Your message of "Fri, 05 Dec 1997 23:44:10 -0200." <199712060144.XAA25942@gaia.coppe.ufrj.br> Date: Fri, 05 Dec 1997 23:29:03 -0700 From: "Justin T. Gibbs" Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I can make no guarantees if you continue to run stable. There are numerous bugs that I have fixed in the ahc driver and SCSI subsystem with CAM, and if you are running that code, I have many more tools to diagnose and fix problems. I do know, however, that the Seagate Barracudas that I have tested have all worked just fine with tagged queuing turned on. While turning off tagged queuing in the driver may stop your panics, you have effectively removed any chance of getting better performance out of the disk subsystem. -- Justin