George - with all those things disabled, does the UDMA disk perform faster than if you just don't use the UDMA in the first place? I'm assuming that you can choose a UDMA driver or the regular IDE driver?
George Bonser wrote: > > Pretty tired at this point but I got it fixed. It is a combination of BIOS > and disk parameters. > > Motherboard is Award BIOS with SiS chipset. The section under PCI and > Onboard IO is set up thusly: > > CPU-PCI Burst Mem Write - Enabled > CPU-PCI Post Mem Write - Enabled > Internal PCI/IDE - Both > IDE Pri Master PIO - Auto > Secondary - Auto > IDE Sec Master PIO - Auto > Secondary - Auto > Primary IDE Prefetch - DISABLED > Secondary IDE Prefetch - DISABLED > IDE Burst Mode - Enabled > IDE Post Write - Disabled > IDE HDD BLock Mode - Enabled > > Then I fiddled with hdparms. The important thing on the UDMA drive > appears to be disabling the internal prefetch with -A 0 and disaling > multiseek with -m 0. My flags look like this: > > hdparm -A 0 -m 0 -c 3 -u 1 -a 4 -k 1 /dev/hdc > > End of errors. -- ...RickM...
