From owner-freebsd-stable Mon Jan 28 14: 6: 1 2002 Delivered-To: freebsd-stable@freebsd.org Received: from smtp.noos.fr (zola.noos.net [212.198.2.76]) by hub.freebsd.org (Postfix) with ESMTP id EFDC037B404 for ; Mon, 28 Jan 2002 14:05:49 -0800 (PST) Received: (qmail 48665634 invoked by uid 0); 28 Jan 2002 22:05:33 -0000 Received: from unknown (HELO atheria.ptijo.net) ([195.132.200.187]) (envelope-sender ) by 212.198.2.76 (qmail-ldap-1.03) with SMTP for ; 28 Jan 2002 22:05:33 -0000 Date: Mon, 28 Jan 2002 23:05:31 +0100 From: ptiJo To: freebsd-stable@FreeBSD.ORG Cc: freebsd-questions@FreeBSD.ORG Subject: divers SCSI questions... Message-Id: <20020128230531.20f8d55b.ptiJo@noos.fr> X-Mailer: Sylpheed version 0.6.5 (GTK+ 1.2.10; i386--freebsd4.4) User-Agent: X-Face: X-Operating-System: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi, as I never played with SCSI and get an old PCI Card, I would like to be enlightened a bit :) so, I got the "Adaptec AHA-2940UW" which specs are: Computer Bus: PCI Local Bus Interface Protocol: Bus master DMA Host Bus Burst Data Rate: 133 MByte/sec Peripheral Bus: 8-bit and 16-bit Wide UltraSCSI SCSI Synchronous Data Rate: 40 MByte/sec SCSI Asynchronous Data Rate: 3.3 MByte/sec Device Protocol: SCSI-1, SCSI-2, SCSI-3, Wide UltraSCSI Device Support: Up to 15 devices under DOS 5.0 and above Here are the questions :) -1- does the data rates specify that, in general, the transfer rate is 3.3 MBytes/sec ? -2- 15 devices under DOS... would it be more under FreeBSD ? is there also a limitation on total size that I would get (15*36Go or 15*9Go, for eg) ? I would like to buy disks now :) IBM 36 Go 10000 RPM SCSI IBM 18 Go 10000 RPM SCSI IBM 9 Go 10000 RPM SCSI -3- do I have to take special care ? I mean, the supported device protocol are SCSI-{1,2,3} and Wide - do all disks (like those recent above) supports @least one of them ? Or do I have to check the disks specs to see which protocol they support ? thX a lot for answers, --------------------- ptiJo Linux: For those who don't like Windows *BSD: For those who like UNIX To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message