From owner-freebsd-questions Thu Aug 9 17: 4: 3 2001 Delivered-To: freebsd-questions@freebsd.org Received: from elvis.mu.org (elvis.mu.org [216.33.66.196]) by hub.freebsd.org (Postfix) with ESMTP id 296F337B401 for ; Thu, 9 Aug 2001 17:04:01 -0700 (PDT) (envelope-from bright@elvis.mu.org) Received: by elvis.mu.org (Postfix, from userid 1192) id F057781D01; Thu, 9 Aug 2001 19:03:50 -0500 (CDT) Date: Thu, 9 Aug 2001 19:03:50 -0500 From: Alfred Perlstein To: Kevin Hui Cc: freebsd-questions@freebsd.org Subject: Re: Experiencing very slow raw write speeds on /dev/ad1 Message-ID: <20010809190350.M85642@elvis.mu.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from khui@cs.toronto.edu on Thu, Aug 09, 2001 at 07:10:06PM -0400 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG * Kevin Hui [010809 18:10] wrote: > Hi all, > > I have installed 2 Maxtor UDMA100 drives in my system, sharing the channel > ide0. /dev/ad0 contains all the FreeBSD partitions and ad1 is used as a > scratch drive (there's nothing on it). Ide1 channel is used for the DVD > drive (which doesn't support UDMA): FreeBSD 4.3 was released with IDE write caching turned off. This was to help people preserve thier data, but since most IDE disks perform so badly with it off it's back on in recent FreeBSD versions. You can also turn it on by adding the line: hw.ata.wc=1 to your /boot/loader.conf and please don't cc multiple lists when asking a question. -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message