i have encountered the same problem and i have met the same obstacle
i was planning to format my compaq evo 1020v and after i got to a certain point it will tell me
that i can not continue due to iastor.sys
so i went to intels download center site and i downloaded the appropraite intel matrix driver for raid and ahci
you need to check if it is either 32bit or 64bit to get the desired result
i used a floppy disk and it asked me for the either tghe specific driver or the default driver
i choose the specific driver and thenm i allowed it to load
from the floppy drive and then the windows xp professional loaded
try it and see it works....thanks
I'm no expert but have been through similar situation.
Yes, you can still install the chipset drivers (i.e., "Chipset Device Software") - even if you installed XP in IDE mode.
I've had so many problems with the F6 floppy part that I now always install XP in IDE mode, it's so much simpler. I'm sure you can install SATA drivers later if you want those features. (Not simple, but do-able)
One thought - did you make sure your BIOS had the SATA Mode set to AHCI before you ran XP setup? You said you have XP up and running, so presumably you abandoned the F6Floppy, and XP was installed in IDE mode? Not sure if trying to load SATA drivers while the BIOS is in IDE mode would account for your error message, but I'm sure someone else can answer that.