Hello! > > though i'm yet to meet drive which could saturate even UDMA(33) > > I'll have to second this. If you try this drive on a 33M bus, and it's > the only device on the bus, you're not likely to see any improvement > just by sticking it on a 66M bus. The drive is the limiting factor > here. I don't think there's a single-disk system that does much above > 20M or so.
I'm using a Western Digital Expert (2MB Cache, 7200RPM), with a Promise Ultra/66 board, and kernel 2.2.12 with the hedrick patches. hdparm -t /dev/hde gives me 22.5 MB/s If I don't turn on the UDMA/66 feature (through this line in lilo.conf: append = "ide2=ata66") the drive runs noticeably slower, I think hdparm -t gave me around 17MB/s. I think that proves that at least in my case, there is some benefit of the UDMA/66 bus. Greetings, Alexis Maldonado Engineering College University of Costa Rica
