Comment 10 for bug 155702

Same problem here. (Hardware: ASUS TUSI-M, SiS630ET chipset. Running Ubuntu 7.10/i686)
To make the things worse, when using md (software RAID), system won't boot, because /dev/md* won't appear during a default delay of 180 seconds (delay could be extended by passing larger value, using rootdelay=<delay> parameter, but this is an ugly solution...).
Patch above (adding udma value for UDMA100) fixes the problem.
I recompiled pata_sis driver out of kernel tree (so I didn't had to recomplie whole the kernel).