From owner-freebsd-alpha Fri Oct 4 8:42:35 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CAB5337B401 for ; Fri, 4 Oct 2002 08:42:33 -0700 (PDT) Received: from alphacentauri.colorado.edu (alphacentauri.Colorado.EDU [128.138.120.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id 320A843E77 for ; Fri, 4 Oct 2002 08:42:33 -0700 (PDT) (envelope-from chris@evilelement.net) Received: from evilelement.net (localhost.localdomain [127.0.0.1]) by alphacentauri.colorado.edu (8.11.6/8.11.6) with ESMTP id g94FhxV22012 for ; Fri, 4 Oct 2002 09:43:59 -0600 Message-ID: <3D9DB73F.4090405@evilelement.net> Date: Fri, 04 Oct 2002 09:43:59 -0600 From: Chris Brotherton Reply-To: chris@evilelement.net User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020827 X-Accept-Language: en-us, en MIME-Version: 1.0 Cc: freebsd-alpha@FreeBSD.org Subject: Re: Alpha PWS 500au SCSI Transfer Rate References: <025596A38A894B45AFE62346A6BF47464E2E97@waexch1.qgraph.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Schroeder, Aaron wrote: > IICRC, those Qlogic 1020/1040 cards were only fast-wide cards and not > Ultra... > > Your new hard drive may be Ultra SCSI, but in order to talk to the card, the > drive has downgraded itself to fast wide. > > If you get an ultra wide card, you will see the 40Mb figure. In reality, > you'll never see those transfer rates anyways. The 20MB and 40MB numbers are > just that: numbers. In reality, the most you will get off any given > Ultra-Wide/Fast-Wide SCSI chain is anywhere from 7-12Mb a sec, and that's > flying. > > Ultra160 and Ultra320 are completely different scenarios, those busses > absolutley scream! > > AJ Schroeder > > -----Original Message----- > From: Chris Brotherton [mailto:chris@evilelement.net] > Sent: Thursday, October 03, 2002 11:09 PM > To: freebsd-alpha@FreeBSD.org > Subject: Alpha PWS 500au SCSI Transfer Rate > > > I am a newbie to both SCSI and FreeBSD. > > I have a Digital PWS 500au with an on board Qlogic 1040B Ultra Wide SCSI > Controller. I used to have an IBM Fast wide SCSI hard drive that was > correctly probed with the following message in dmesg. > > da0 at isp0 bus 0 target 0 lun 0 > da0: Fixed Direct Access SCSI-2 device > da0: 20.000MB/s transfers (10.000MHz, offset 8, 16 bit), Tagged > Queueing Enabled > > I recently replaced this hard drive with a new Seagate ST336706LW - > 36ES. I notice the following dmesg. > > da0 at isp0 bus 0 target 0 lun 0 > da0: Fixed Direct Access SCSI-3 device > da0: 20.000MB/s transfers (10.000MHz, offset 8, 16 bit), Tagged > Queueing Enabled > > My question is: Why doesn't this drive operate at 40.000MB/s since it > is backwards compatible with Ultra Wide SCSI? Do I need to set > something up in the SRM before booting FreeBSD? > > Here is the SCSI controller detection lines from dmesg: > > isp0: port 0x8000-0x80ff mem > 0x81080000-0x81080fff irq 3 at device 4.0 on pci1 > isp0: interrupting at CIA irq 3 > > Thanks for your help. > > Chris. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-alpha" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org This SCSI controller is on the motherboard and the model number is 1040B. According to Qlogics website, this controller is ultra wide. Chris. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message