The IBM TotalStorage DS4100 (formerly FAStT100) is designed to give cost-conscious enterprises an entry-level server that can help address storage consolidation. Single controller model supports up to 5.6TB while the dual controller model supports up to 44.8TB of Serial ATA (SATA) physical disk storage with DS4000 EXP100—provided by up to 14 internal 400GB disk drives inside the controller—the DS4100 can provide ample yet scalable storage without the cost of extra expansion units. This disk system is designed to help consolidate direct-attached storage into a centrally managed, shared or storage area network (SAN) environment. With four Fibre Channel ports to attach to servers on dual controller, the need for additional switches is reduced or eliminated for additional potential cost savings.