The HP StorageWorks 1510i Modular Smart Array is an iSCSI based 2U controller shelf that connects to both enterprise-class SCSI and Serial ATA (SATA) disk enclosures. (HP recommends SCSI drives for intensive heavy I/O requirements while SATA drives should be used in archived, near on-line disk-to-disk backup configurations). This combination provides customers with a low cost, high capacity storage solution.