That's essentially a more expensive (manpower-wise) and less reliable alternative to tapes. Keep in mind that what might be considered 'a lot of data' varies s

That's essentially a more expensive (manpower-wise) and less reliable alternative to tapes. Keep in mind that what might be considered 'a lot of data' varies significantly. A medium commercial company here in west EU is going to require about 0.5PB of backup space for a single data rotation. In other areas you might get away with storing 100TB or even less.