Anyone know the possible cause for frequent HDD failure? I am not even sure would it be even consider frequent or simply just the norm. But so far we already have 2 HDD replaced in 2013. The SAN is a * EMC CX4-120 * 26 HDD * 12 LUN * 3 Storage group * 10 LUN is being used for database server. So very intense read and write * Disk is Seagate STE45085 CLAR450 * About 3 to 4 years old My guess is the database intense read and write activities. Any input is appreciated.