This morning my Main file server popped up a BSOD. No error codes or such just a blue screen saying that the OS had encountered a critical error. I rebooted the system, it didn't see the RAID controller at all. I powered down for about 30 seconds and turned power back on, it booted straight into w2k3 with no errors and I was able to log on. It ran for about 10 minutes then got another BSOD with a kernel inpage fault error. It appears to be either a bad HD or the controller is going shot i think. Anyway to determine if it's a HD problem without any error lights on the HD blinking?