From owner-freebsd-scsi@FreeBSD.ORG Tue May 11 13:38:44 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5FF6C16A4CE for ; Tue, 11 May 2004 13:38:44 -0700 (PDT) Received: from bremen.shuttle.de (bremen.shuttle.de [194.95.249.251]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6FB9C43D5E for ; Tue, 11 May 2004 13:38:43 -0700 (PDT) (envelope-from schweikh@schweikhardt.net) Received: by bremen.shuttle.de (Postfix, from userid 10) id A178C3BB1A; Tue, 11 May 2004 22:38:41 +0200 (CEST) Received: from hal9000.schweikhardt.net (localhost [127.0.0.1]) i4BKbUxU002617 for ; Tue, 11 May 2004 22:37:30 +0200 (CEST) (envelope-from schweikh@hal9000.schweikhardt.net) Received: (from schweikh@localhost) by hal9000.schweikhardt.net (8.12.11/8.12.11/Submit) id i4BKbULk002616 for freebsd-scsi@freebsd.org; Tue, 11 May 2004 22:37:30 +0200 (CEST) (envelope-from schweikh) Date: Tue, 11 May 2004 22:37:30 +0200 From: Jens Schweikhardt To: freebsd-scsi@freebsd.org Message-ID: <20040511203730.GB2256@schweikhardt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.6i Subject: 2120S Stripe - abysmal performance X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 May 2004 20:38:44 -0000 hello, world\n I hoped that my new Adaptec 2120S U320 RAID in my new Supermicro P4SCT board with 64bit/66MHz PCI would turn my disk IO into a desktop blitz, but the opposite has happened. While my old ASUS A7N8X with vinum would read 100MB/s from 2 Fujitsu MAP3367 connected to an 29160, I get only 29MB/sec from the stripe built with the 2120S (as measured with dd to /dev/null). What I have done so far: o have reset the 2120S config to factory defaults. o set the transfer speed to U160 and disabled "packetized" because I could not low level format the drives otherwise. Until that point I had a lot of trouble even getting the 2120S to boot its controller kernel. Effect has been seemingly endless (5min) twirling baton. o low level formatted both MAPs, initialized them and then built the stripe with 64kb stripe size. o I have enabled caching in both directions. The dmesg says schweikh@hal9000:~ $ dmesg|grep aac aac0: mem 0xe8000000-0xebffffff irq 9 at device 1.0 on pci3 aac0: Reserved 0x4000000 bytes for rid 0x10 type 3 at 0xe8000000 aac0: [FAST] aac0: i960RX 100MHz, 48MB cache memory, optional battery present aac0: Kernel 4.0-0, Build 6011, S/N ba12c0 aac0: Supported Options=1f7e aacd0: on aac0 aacd0: 69997MB (143354880 sectors) Any enlightenment on how to improve disk io greatly appreciated. Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)