Hello. On Wed, Oct 13, 1999 at 08:15:12PM -0700, aphro wrote: > i read in the kernel mailing list that UDMA66 isn't possible in the linux > kernel yet. even with a patch its bound to cause lockups.
It is possible. I have a Promise Ultra/66 board running with a Western Digital Expert 27.3GB, at UDMA/66. I'm using kernel 2.2.12, with patches that can be found on your local kernel mirror under people/hedrick. I have been using it for 2 months, and it has been rock solid stable. (And pretty fast too: using hdparm -t /dev/hde , I get 22.5 MB/sec) I'm using a stock slink system, btw. I'm only using the first UDMA/66 channel, so I wouldn't know about the problem described below. > > http://kt.linuxcare.com/kt19990927_36.html#12 > > "You can not currently use the second ATA-66 channel under Linux. Unless > you have a rabbit in the hat to register/service/handle the interrupt > assignment to pin B for the second channel, it will lockup regardless. The > interrupt is not serviced correctly. This will be on all mainboards that > have native onboard support." Have a good day, Alexis Maldonado Engineering College University of Costa Rica
