Date: Thu, 28 Aug 2003 16:47:56 +0200 (CEST) From: Soren Schmidt <sos@spider.deepcore.dk> To: Anish Mistry <mistry.7@osu.edu> Cc: freebsd-current@FreeBSD.ORG Subject: Re: ATAng no PIO fallback? Message-ID: <200308281447.h7SElu27025585@spider.deepcore.dk> In-Reply-To: <200308281040.15343.mistry.7@osu.edu>
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It seems Anish Mistry wrote: > > > > it DMA was fixed for my CD/DVD combo drive. I changed the > > > > hw.ata.atapi_dma="0" > > > > to hw.ata.atapi_dma="1" in my /boot/loader.conf. After a reboot I tried > > There is no PIO fallback in ATAng (so far), if you know that your ATAPI > > device doesn't do DMA why on earth do you enable it ? > > > Because the drive does support DMA. I've tested to see it DMA actually works > in windows, PIO vs DMA while playing a DVD, and there is a big difference, > and I can only assume that it works. Hmm, I didn't hear the "works in windows" bit :) Could you mail me a dmesg from the system, that might uncover some usefull info on if/how/why DMA can work on your HW.. -Søren
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