If the data cable is not plugged in, the HDD spins down automatically on both computers after approx. 5 minutes. However if both cables (power+data) are plugged in, it does NOT spin-down when connected to PC/XP while it still does on A1...
:-?
It doesn't seem to be a HDD feature after all - have you checked all options on your A1? Maybe there's a BIOS/EFI feature causing this?
