Keep pace with your rapidly expanding data storage needs with with state of the art deduplication. Easily improve performance and increase capacity by adding a storage module to your existing solution. Designed with growth in mind, our two-tiered DSI420 scales in increments of 12TB. Tier 1 (DSI420-T1B) meets mid-range data needs and can grow from 12TB to 72TB. Tier 2 (DSI420-T2B) is for the enterprise customer with larger data demands, scaling from 84TB - 144TB per node.