Combine LUNs from multiple RAID controllers with SFW to construct a very large volume capable of holding a very large database or file system, spanning multiple LUNs across controllers. This combined capability can give users better access to their data than if the file system or database is split across multiple LUNs.

For any type of hardware RAID used in an array, the size of a database or file system is limited to the maximum size of a logical unit number (LUN) in the particular hardware array. However, this limitation is removed with advanced host-based volume management.