ok, the disks will have more capacity, but speed probably wont be enough. All queries will take twice the time for twice the data. Everybody says the number of drives or spindles limits the IO/s. We need a solution that can grow wrt. capacity AND PERFORMANCE. We also would need twice the CPU peformance, so a new server will be necessary. It may be necessary to store 500TB in less than 3 years. How could we do that? One server wont have enough performance.