From owner-freebsd-scsi Mon Apr 15 23: 8: 5 2002 Delivered-To: freebsd-scsi@freebsd.org Received: from rover.village.org (rover.bsdimp.com [204.144.255.66]) by hub.freebsd.org (Postfix) with ESMTP id 9600E37B416 for ; Mon, 15 Apr 2002 23:08:01 -0700 (PDT) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.11.3/8.11.3) with ESMTP id g3G680i34740 for ; Tue, 16 Apr 2002 00:08:00 -0600 (MDT) (envelope-from imp@village.org) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.11.6/8.11.6) with ESMTP id g3G67xQ00587 for ; Tue, 16 Apr 2002 00:07:59 -0600 (MDT) (envelope-from imp@village.org) Date: Tue, 16 Apr 2002 00:07:50 -0600 (MDT) Message-Id: <20020416.000750.89789192.imp@village.org> To: scsi@freebsd.org Subject: How to get 160MB/s LVD drives to use 160MB/s From: "M. Warner Losh" X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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 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. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message