-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Greg, Use hdparm to disable DMA as follows. hdparm -d0 /dev/hdd Keep in mind though that DMA is generally a better choice, so unless you have very good reasons for doing this you probably don't want to do it. - -- It's not one damn thing after another, it's the same damn thing over and over. (History repeats itself) Joseph C. Lininger jbahm at pcdesk.net Verification: 5eab38a77ac40416e075be8f50607ff7 And so it came to pass that on , Gregory Nowak said > Hi all. > > The subject pretty much says it all. Under linux 2.4.x, pio was used > instead of dma for drives. Now, linux 2.6.x uses dma by default. I > have reasons for wanting to use pio with one of my drives under linux > 2.6.12.3, instead of using dma. For example, the dmesg output for my second > ide interface currently reads: > > ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:DMA > > I want to use /dev/hdd in pio mode, and still be able to leave > /dev/hdc using dma mode. I suspect that using pio mode instead of dma > mode is possible, since there is no /dev/hdb on this machine, and the > dmesg output for the first ide interface reads: > > ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio > > I've looked through the list of kernel parameters that can be passed > to the kernel through the boot loader, and have done some googling, > but haven't yet found a way to use pio for a particular drive. So, if > anyone does know how this would be done, your help would be > appreciated. Again, thanks in advance, and for all the help this last > week. > > Greg > > > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (MingW32) iD8DBQFDHM2WJ6dqn0mqPbARAhIpAKCJsNTZYi26TYAX5xs+AV+1hBbttQCgx4uH qRYkI56jzqEFTihtG5gLKOI= =CvJk -----END PGP SIGNATURE-----
