From mboxrd@z Thu Jan 1 00:00:00 1970 From: Denny Page Subject: Re: Adaptec aic79xx performance Date: Sat, 03 Dec 2005 02:01:10 -0800 Message-ID: <43916CE6.1090206@cococafe.com> References: <439165A1.8070900@cococafe.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.cococafe.com ([64.142.30.235]:12426 "EHLO mail.cococafe.com") by vger.kernel.org with ESMTP id S1750905AbVLCKBP (ORCPT ); Sat, 3 Dec 2005 05:01:15 -0500 Received: from marvin.cococafe.com (gw.cococafe.com [64.142.30.237]) by mail.cococafe.com (Postfix) with ESMTP id DA20C590 for ; Sat, 3 Dec 2005 02:01:14 -0800 (PST) Received: from [192.168.0.10] (daffy.cococafe.com [192.168.0.10]) by marvin.cococafe.com (Postfix) with ESMTP id C8B9D7FD for ; Sat, 3 Dec 2005 02:01:14 -0800 (PST) In-Reply-To: <439165A1.8070900@cococafe.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Linux SCSI Mailing List Further info, indicating a negotiation problem: /proc/scsi/aic7xxx: Target 3 Negotiation Settings User: 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit) Goal: 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit) Curr: 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit) Channel A Target 3 Lun 0 Settings Commands Queued 24 Commands Active 0 Command Openings 1 Max Tagged Openings 0 Device Queue Frozen Count 0 /proc/scsi/aic79xx: Target 3 Negotiation Settings User: 320.000MB/s transfers (160.000MHz RDSTRM|DT|IU|RTI|QAS, 16bit) Goal: 3.300MB/s transfers Curr: 3.300MB/s transfers Channel A Target 3 Lun 0 Settings Commands Queued 19 Commands Active 0 Command Openings 1 Max Tagged Openings 0 Device Queue Frozen Count 0 Kinda explains the abysmal data rate. I am guessing that this is a bug. Anyone looked at this? Thanks, Denny