Provides an additional 18TB of usable capacity, requires subscription licenses (WDYXK-ALYS-HxxA) to enable the software. Order quantity one to 16 to increase physical system capacity from 27TB to 45TB, 63TB, 81TB, 99TB, 117TB, 135TB, 153TB, 171TB, 189TB, 207TB, 225TB, 243TB, 261TB, 279TB, 297TB, or 315TB. Includes customer installable hardware license, SAS HBA, memory upgrade(s), up to two populated 2U drive chassis; customer installable rails, redundant power supplies, and 6ft (1.8m) NEMA 5-15P-to-IEC C13 and 6ft (1.8m) IEC C13-to-C14 power cords. Customer installable but optional phone-based installation (SDY48-NSYS-PB00) or onsite installation (SDY48-NSYS-000x) are also available. If Atempo Tina is licensed for use with the DXi system, when DXi capacity is added, additional Atempo Tina capacity must be purchased to match the DXi capacity.