Messages in this thread | | | Date | Sat, 05 Jan 2002 00:20:47 -0700 | From | Dmitri Pogosyan <> | Subject | Re: ASUS KT266A/VT8233 board and UDMA setting |
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Vojtech Pavlik wrote:
> > My new IBM 40GB hard drive on ide0 (alone, master) controller is > > always get set at boot > > to UDMA2 mode, not UDMA5. > > The second identical drive on onboard promise controller is getting set > > to UDMA5 > > and runs much faster. > > > > I looked in BIOS setup, and BIOS sets the first ide0 drive to UDMA5, > > which at least says that > > cable is the correct one, and that it is linux boot which changes the > > setting to udma2. > > > > Here are the related pieces of dmesg. As you see I use RH rawhide 2.4.16 > > kernel, which is > > something like 2.4.17-pre8, I think > > Some RH kernels (may include yours) deliberately disable UDMA3, 4 and 5 > on any VIA IDE controller. I don't know why. Unpatch your kernel and > it'll likely work. >
Thanks, where should I look in the code to see if this is applicable to my kernel version ? Also RH7.2 stock 2.4.7 kernel was totally unhappy with my configuration (VIA-IDE: chipset unknown - contact you) and DMA could not be set at all. This was main my reason to upgrade to 2.4.16
Regards, Dmitri
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