Xa-Miner 4 bay configurations come standard with a 3 year parts/labor limited warranty. Xtended Warranty extends this to a total of five years and includes all components associated with the unit. including drives. We use a variety of drive models and manufacturers. Most have at least 3 year warranties from the manufacturer but some drive models carry a 5 year warranty. Systems are not guaranteed to come with drive models beyond 3 year warranties.