The QNAP TS-659 Pro II Turbo NAS is the enterprise-class network-attached storage designed with next-generation technology like 6Gb/s (SATA III) hard drives support, delivering blasting fast data transfer speeds. The TS-659 Pro II houses up to six hot-swappable 3.5-inch or 2.5-inch SATA hard disk drives for up to 18TB of networked storage (based on 3TB drives). The TS-659 Pro II incorporates the Intel Atom D525 1.8GHz dual core processor, capable of delivering ultra high performance, reliability, and lower power consumption during intensive data transfers. The TS-659 Pro II features 1GB of high performance DDRIII RAM, which can be upgraded to 3GB by simply adding a 2GB RAM in the additional RAM slot. The TS-659 Pro II NAS supports super high-speed USB 3.0 ports, eSATA ports, and dual Gigabit network interfaces with load-balancing and failover support. Also standard is single disk, RAID 0, 1, 10, 5, 6, 10+hot spare, 5+hot spare, or 6+hot spare with online RAID capacity expansion and online RAID level migration for maximum data redundancy. Is your network fully virtualized? The TS-659 Pro II is an efficient and powerful business storage center with advanced iSCSI services, cross-platform data sharing, and all-in-one server applications. With VMware Ready and Citrix Ready certification, and proven compatibility with Microsoft Hyper-V environment, the NAS is an ideal shared storage solution for virtualized and clustered environments.