Date: Sat, 21 Jul 2001 09:23:47 -0700 From: Kent Stewart <kstewart@urx.com> To: User & Ian Patrick Thomas <ipthomas_77@yahoo.com> Cc: Bill Moran <wmoran@iowna.com>, freebsd-questions@freebsd.org Subject: Re: How to change UDMA mode on ata drives Message-ID: <3B59AC93.759B233C@urx.com> References: <3B5987B1.C5310BB0@iowna.com> <20010721114445.C5115@localhost> <3B59A707.F4D60AD0@iowna.com> <20010721121247.E5115@localhost>
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User & Ian Patrick Thomas wrote: > > As it was put forth by Bill Moran on Sat, Jul 21, 2001 at 12:00:07PM -0400... > > User & Ian Patrick Thomas wrote: > > > > > > As it was put forth by Bill Moran on Sat, Jul 21, 2001 at 09:46:25AM -0400... > > > > I've got an ata100 drive that's buggy under ata100. I want to throttle it > > > > back to ata66 mode to see if the problem still exists. How is this done? > > > > > > > > -Bill > > > > > > > > > > Try this > > > > > > sysctl -a | grep "hw.ata.*" > > > > > > and check out man sysctl. > > > > > > Ian > > > > Thanks for the reply. > > > > The only options I have through sysctl are hw.atamodes, and hw.ata.ata_dma > > both of which only allow turning DMA on and off. I would like to leave it > > on, but force the controller to use UDMA4 (ata66) instead of UDMA5 (ata100) > > > > Is there a method for this, or is it an on/off proposition? > > I havn't found one that allows you to specify 66 instead of 100. If > you wanted to throttle down to 33 then you could use the 40 cable, but both > 66 and 100 use the 80 cable, correct? The driver uses the maximum > achievable speed. Could it be that the source to the driver needs to be > tweaked? Maxtor and Western Digital both have programs that will set the mode of the HD. Kent > > Ian > > > > > -Bill > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Kent Stewart Richland, WA mailto:kbstew99@hotmail.com http://kstewart.urx.com/kstewart/index.html FreeBSD News http://daily.daemonnews.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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