i have my two hdd's on the raid ide 3 on my kr7a abit board all seems to work ok but the hdd light is now on all the time on my case the hdds are set as master and slave on a ata100 cable .... when the hdd were on ide 1 the light went on and off when accessing .....ide 1&2 are full with roms... the hdd light power lead is on correctly

My mobo has a different hdd activity pin for the raid. If yours is the same then you need to swap the hdd light lead over to get it to register hdd activity.