External Connectors: 1 x SFF-8088 mini SAS 300 - Serial Attached SCSI External Internal Connectors: 4 x SFF-8087 mini SAS 300 - Serial Attached SCSI Internal Transfer Rate: Up to 300 MBps Per Port RAID: 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD. Cache Memory: 512 MB DDR2 Operating Systems Supported: PC Unix Solaris Dimensions: 4.60" x 6.60" Features: Product Type: SATA RAID Controller Drive Support: Up to 256 x Physical Green Compliance: Yes Green Compliance Certificate/Authority: RoHS