The DS3400 external storage enclosures are designed to be an easy, scalable, flexible, and affordable solution for System x and BladeCenter servers. The DS3400 is a 4Gb external Fibre Channel storage solution that is easy to deploy and manage. Available in single and dual controller models, the DS3400 scales in capacity to support a total of 48 hard disk drives by using the EXP3000 expansion unit. The DS3400 is a direct-attach and SAN solution for System x, and BladeCenter servers, and enables small and medium businesses manage their fast-growing data capacity requirements on an affordable budget.