External PCI Express technology. Intel Xscale Technology- based IOP 64 bits RISC processor. Support up to 24 3Gb SATA II drives. Support up to DDR II 2GB cache memory with BBM protection. Comprehensive RAID Levels: 0, 1, 5, 6, 0+1, and JBOD. Instant availability by on-the-fly RAID initialization. Optimized for 2/4K HD format video processing. Performance Equalization Mode (EQ Mode). Disk Lag Proof technology. Support snapshot for fast backup and restore. Support Windows Vista 32/64 bit, Server 2008 32/64 bit WHQL certified. Support MAC OS and Linux platform. Support SNMP (Simple Network Management Protocol).