Date: Thu, 9 Aug 2001 19:03:50 -0500 From: Alfred Perlstein <bright@mu.org> To: Kevin Hui <khui@cs.toronto.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Experiencing very slow raw write speeds on /dev/ad1 Message-ID: <20010809190350.M85642@elvis.mu.org> In-Reply-To: <Pine.GSO.4.21.0108091853190.5157-100000@gardiner.cs>; from khui@cs.toronto.edu on Thu, Aug 09, 2001 at 07:10:06PM -0400 References: <Pine.GSO.4.21.0108091853190.5157-100000@gardiner.cs>
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* Kevin Hui <khui@cs.toronto.edu> [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
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