Q: originally the disk is IDE interface, capacitance is 80GB. Is it necessary to update to SATA2 interface 250GB disk?
A: you should judge according to actual situation whether necessary to update. If the original disk capacitance is enough, then no need to update. If need to update because the original capacitance is not enough, then not suggest updating to 250GB disk, but choosing 500GB disk, because 250GB disk’s price is around 45USD, while 500GB disk is about 52 USD, although just few bucks higher, but the capacitance doubles. The price/performance ratio is much higher.