i have a p4c800e deluxe (my 2nd one) with an 80gb pata system drive and a 250gb sata storage drive. i had an 80 gb sata drive for the system drive originally but thought it went bad so i replaced it w/ a pata drive. the mobo stopped recognizing the sata drive and caused it to make knocking sounds which usually happens with bad hdds. but then the 250 went bad shortly after so i tested both drives in another system and they work. there were a few bad sectors on the 80 but the knocking sound was gone so i'm guessing it could've been caused by the mobo. now the 2nd mobo is exhibiting the same problem. is this a known issue? or is it just my bad luck? i don't seem to have this problem with my p4p800.