Date: Mon, 20 Dec 1999 12:17:27 -0700 From: hal Lynch <hal@sticky.usu.edu> To: FreeBSDQuestions <freebsd-questions@FreeBSD.ORG> Subject: Re: when is it safe to use the 0xa0ffa0ff disk flags? Message-ID: <l03130300b4842033f590@[129.123.1.184]>
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>It isn't a function of the disk as much as an interaction between the >disk and the rest of the hardware. It is something you can test before >you fix it in the kernel. These parameters can be configured during >boot. Changing them at boot time lets you test the configuration and >then make it permanent by adding the flags in your kernel. I went from >2-3MB/s to 12-14MB/s. This isn't a trivial improvement :). I made the changes to my kernel and indeed I saw an improvement, but not nearly as much as you (2.4MB/s to 2.7MB/s)?! I then received a minor revalation that that I should look at the bios. After setting Ultra DMA and PIO/DMA modes to AUTO and Block Mode sectors to HDD MAX I finally got what I paid for 15MB/s. There's a lesson in there somewhere! hal To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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