Date: Thu, 30 Aug 2001 00:47:38 -0700 (PDT) From: Trevin Chow <tmchow@sfu.ca> To: Mike Meyer <mwm@mired.org> Cc: <questions@freebsd.org> Subject: Re: Performance tuning and adding RAM Message-ID: <20010830004542.A80091-100000@benny.geektank.org> In-Reply-To: <15245.52453.614096.245669@guru.mired.org>
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On Thu, 30 Aug 2001, Mike Meyer wrote: > For IDE drives, you disable this by setting the sysctl hw.ata.wc to 0, > but it has to be done from the boot loader at boot time. If you are > running 4.3-RELEASE, it's set off by default. If you're running > something prior to 4.3-RELEASE, you may not be able to set it at > all. The drive manufacturer may provide a DOS utility that will let > you turn it off as well. > > If you are using SCSI disks, you can use the camcontrol modepage > command to check and disable it. It's the WCE value on page 8; use > "camcontrol modepage daX -m 8 -e" to start an editor, change the 1 to > a 0, and then exit. What will provide a "bigger" performance boost? Soft updates or IDE Cache (hw.ata.wc)? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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