From owner-freebsd-stable Fri Apr 17 23:32:04 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA11907 for freebsd-stable-outgoing; Fri, 17 Apr 1998 23:32:04 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from vnode.vmunix.com (vnode.vmunix.com [209.112.4.20]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id GAA11850; Sat, 18 Apr 1998 06:31:55 GMT (envelope-from mark@vnode.vmunix.com) Received: (from mark@localhost) by vnode.vmunix.com (8.8.8/8.8.8) id CAA03178; Sat, 18 Apr 1998 02:33:08 -0400 (EDT) (envelope-from mark) Message-ID: <19980418023307.34709@vmunix.com> Date: Sat, 18 Apr 1998 02:33:07 -0400 From: Mark Mayo To: stable@FreeBSD.ORG Cc: hardware@FreeBSD.ORG Subject: best wdc0 flags ? Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89.1i X-Operating-System: FreeBSD 2.2.5-STABLE i386 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk Hi. I just put a shiney new IDE (Ultra33) drive in a machine, and I'm wondering what the best flags to use for the drive are.. I realize that I can't get DMA on -STABLE (cvsupping right now), but with the default LINT flags of: controller wdc0 at isa? port "IO_WD1" bio irq 14 flags 0x00ff8004 .. which turns on 32-bit transfers and multi-block-4 I'm gettting really crappy performance.. vnode:{76}~ % iozone 160 32000 ... IOZONE performance measurements: 2237052 bytes/second for writing the file 2264181 bytes/second for reading the file Now that is horrible. :-) Same results with block-size of 8K. I think I'll try without the flag option at all and see how it performs. Any recomendations appreciated, -Mark P.S. The drive is a Quantum Fireball SE 4.3GB, FWIW. -- ------------------------------------------------------------------------ Mark Mayo mark@vmunix.com RingZero Comp. http://www.vmunix.com/mark finger mark@vmunix.com for my PGP key and GCS code ------------------------------------------------------------------------ "The problem is how do you build tools that understand your programs at a deeper semantic level." - James Gosling To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message