From owner-freebsd-scsi Mon Apr 15 23:18:18 2002 Delivered-To: freebsd-scsi@freebsd.org Received: from freebie.xs4all.nl (freebie.xs4all.nl [213.84.32.253]) by hub.freebsd.org (Postfix) with ESMTP id 6EF6837B419 for ; Mon, 15 Apr 2002 23:18:15 -0700 (PDT) Received: (from wkb@localhost) by freebie.xs4all.nl (8.11.6/8.11.6) id g3G6IAq17238; Tue, 16 Apr 2002 08:18:10 +0200 (CEST) (envelope-from wkb) Date: Tue, 16 Apr 2002 08:18:10 +0200 From: Wilko Bulte To: "M. Warner Losh" Cc: scsi@FreeBSD.ORG Subject: Re: How to get 160MB/s LVD drives to use 160MB/s Message-ID: <20020416081810.A17224@freebie.xs4all.nl> References: <20020416.000750.89789192.imp@village.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020416.000750.89789192.imp@village.org>; from imp@village.org on Tue, Apr 16, 2002 at 12:07:50AM -0600 X-OS: FreeBSD 4.5-STABLE X-PGP: finger wilko@freebsd.org Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Tue, Apr 16, 2002 at 12:07:50AM -0600, M. Warner Losh wrote: > I'm runing 4.5-release. From my dmesg: > > ahc0: port 0x9000-0x90ff mem 0xdf800000-0 > xdf800fff irq 11 at device 12.0 on pci0 > aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/255 SCBs > > da0 at ahc0 bus 0 target 0 lun 0 > da0: Fixed Direct Access SCSI-3 device > da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled > da0: 17501MB (35843670 512 byte sectors: 255H 63S/T 2231C) > da1 at ahc0 bus 0 target 1 lun 0 > da1: Fixed Direct Access SCSI-2 device > da1: 40.000MB/s transfers (20.000MHz, offset 63, 16bit), Tagged Queueing Enabled > da1: 34732MB (71132959 512 byte sectors: 255H 63S/T 4427C) > > > Notice that I'm only getting 40MB/s transfers. The BIOS detects them > at 40MB/s, even though I have the max transfer set to 160. It does > this with one or two drives on the bus. They are SCA drives in > adapters (any chance it is a jumper on the adapter?). > > How do I get 160MB/s on these drives? As near as I can tell from the > spec sheets, they both should support 160MB/s. Are you sure you have LVD terminators at each end of the bus? And sufficiently short cable/bus length. U160 does something called domain verification (IIRC) to check if the bus is electrically sound enough to go high speed. -- | / o / /_ _ wilko@FreeBSD.org |/|/ / / /( (_) Bulte Arnhem, the Netherlands To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message