The generation of Adaptec Unified Serial controllers meets your need for maximum performance, scalability, and flexibility for enterprise-class applications, including network attached storage (NAS), online transaction processing (OTLP), web, digital surveillance, and streaming applications. The Adaptec RAID 5805 is equipped with industry-leading dual core RAID on Chip (ROC), the latest x8 PCI-Express connectivity, and 512 MB of DDR2 cache to deliver over 250,000 IO per second and 1.2 GB/s. Eight internal ports in this Unified Serial controller allow you to connect up to 256 SATA/SAS disk drives through SAS expanders. The Adaptec RAID 5805 features Adaptec RAID Code (ARC) with RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD, as well as copyback hot spare. Adaptec Storage Manager provides one-view centralized management of all your Adaptec RAID controllers. The Adaptec RAID 5085 also integrates the latest PCIe connectivity, the broadest operating system support, including open source Linux drivers, a battery backup option, and proven compatibility.