Date: Mon, 15 Jan 2001 18:30:02 -0800 (PST) From: Ken Lui <klui@cup.hp.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/24368: Not having ATA_ENABLE_ATAPI_DMA still has DMA enabled in the kernel Message-ID: <200101160230.f0G2U2S57400@freefall.freebsd.org>
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The following reply was made to PR kern/24368; it has been noted by GNATS. From: Ken Lui <klui@cup.hp.com> To: Brooks Davis <brooks@one-eyed-alien.net> Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/24368: Not having ATA_ENABLE_ATAPI_DMA still has DMA enabled in the kernel Date: Mon, 15 Jan 2001 18:26:17 -0800 (PST) On Mon, 15 Jan 2001, Brooks Davis wrote: > On Mon, Jan 15, 2001 at 05:45:46PM -0800, klui@cup.hp.com wrote: > > I, like a lot of other people with the Asus A7V, have drive timeouts > > when using the onboard ATA100 controller with UDMA drives. The kernel > > configuration says that if ATA_ENABLE_ATAPI_DMA isn't defined, DMA mode > > is not used. However, I have found that, for my A7V anyway, DMA is > > always enabled during boot time and /etc/sysctl.conf doesn't always turn > > off DMA mode before I get the timeouts and PIO fallback routines. > > I think you're confused (this could be the fault of the docs). > ATA_ENABLE_ATAPI_DMA only controls ATAPI DMA which only applies to things > like CD-ROMs, Zip drives, TAPEs, etc. It will have no effect on your > hard drives. I've also been told by Gregory Bond of the same thing. Sorry, but I'm used to SCSI and ATA/ATAPI kinda sorta looks the same to me. So what's the proper way to fix my problem? Perhaps a ATA_DISABLE_ATA_DMA flag? Sounds kinda repetitive. I will probably move the drive to the primary IDE connector of my A7V. Ken To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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