From owner-freebsd-scsi Tue Dec 3 10:56:15 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id KAA05320 for freebsd-scsi-outgoing; Tue, 3 Dec 1996 10:56:15 -0800 (PST) Received: from capella.grayphics.com (root@capella.grayphics.com [207.71.216.2]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id KAA05308 for ; Tue, 3 Dec 1996 10:56:12 -0800 (PST) Received: from localhost (nick@localhost) by capella.grayphics.com (8.8.3/8.8.3) with SMTP id KAA23932; Tue, 3 Dec 1996 10:55:46 -0800 (PST) Date: Tue, 3 Dec 1996 10:55:45 -0800 (PST) From: Nick Esborn To: Christophe Prevotaux cc: freebsd-scsi@FreeBSD.org Subject: Re: 2940UW Adaptec SCSI Controler In-Reply-To: <3.0.32.19961203175548.00a5a574@pop.ebc.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-scsi@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk I run a 2.1.5 system with the 2940UW card and a few Seagate Elite drives. I've been quite happy with the performance. Here are some iozone measurements I took: Writing the 64 Megabyte file, 'iozone.tmp'...33.671875 seconds Reading the file...20.984375 seconds IOZONE performance measurements: 1993024 bytes/second for writing the file 3198039 bytes/second for reading the file The Elites are fast/narrow drives, I don't have any fast/wides or ultras. That considered, I'm pretty pleased with these numbers. On the same logic board I get about 2100k/sec from reasonably good IDE drives. On Tue, 3 Dec 1996, Christophe Prevotaux wrote: > I want to use AHA 2940UW Adaptec PCI SCSI controller under FreeBSD 2.1.5 > is the support under FreeBSD 2.1.5 fairly good , good or excellent ? > are there any known problems ? would anyone recommend it for usage with > more than 32MB of RAM and Wide SCSI-3 Disks ? Nick Grayphics http://www.grayphics.com/