From owner-freebsd-hackers Sun Jun 2 01:47:43 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id BAA10378 for hackers-outgoing; Sun, 2 Jun 1996 01:47:43 -0700 (PDT) Received: from mailhub.aros.net (mailhub.aros.net [205.164.111.17]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id BAA10373 for ; Sun, 2 Jun 1996 01:47:38 -0700 (PDT) Received: from terra.aros.net (terra.aros.net [205.164.111.10]) by mailhub.aros.net (8.7.5/Unknown) with ESMTP id DAA03175 for ; Sun, 2 Jun 1996 03:20:15 -0600 (MDT) Received: (from angio@localhost) by terra.aros.net (8.7.5/8.6.12) id CAA15040 for freebsd-hackers@freebsd.org; Sun, 2 Jun 1996 02:47:36 -0600 From: Dave Andersen Message-Id: <199606020847.CAA15040@terra.aros.net> Subject: CCD performance tuning To: freebsd-hackers@freebsd.org Date: Sun, 2 Jun 1996 02:47:36 -0600 (MDT) X-Mailer: ELM [version 2.4 PL25 PGP2] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I've been playing around with the ccd (2.1-stable) with two quantum grand prix 4gb drives, and the performance improvements I've noticed have been somewhat marginal, if at all. (Performance as measured by bonnie remains at only about 4.3MB/second with the two drives striped). No matter how I tune the interleave, I'm unable to increase this value much -- it remains about the same as that for a single drive. The only thing that does improve is the seeks/second, and even that isn't an amazing improvement. The drives are on an Adaptec 2940UW. P100, triton chipset. Is this more of a motherboard problme, or a dave-is-being-stupid problem? I'm afraid I'm not much of a hardware guru, so I may be overlooking something pretty obvious. -Dave Andersen -- angio@aros.net Complete virtual hosting and business-oriented system administration Internet services. (WWW, FTP, email) http://www.aros.net/ http://www.aros.net/about/virtual "There are only two industries that refer to thier customers as 'users'."