The Sun StorageTek SAS RAID Host Bus Adapter (HBA), Internal brings cost-effective enterprise-class RAID functionality to Sun customers who need secure, performanceoptimized data storage and retrieval solutions.Designed for high-speed PCI Express-based Sun servers with 8 to 16 internal hard drives this 8-channel HBA upgrades systems with both advanced RAID data protection and the next generation connectivity of 3 Gb/sec Serial Attached SCSI (SAS), the interface of choice for storage administrators who place high priority on bandwidth and availability. This makes StorageTek SAS RAID HBAs ideal for small-to-mid-sized enterprises seeking a direct attached storage (DAS) solution with superior data protection, reliability and performance.This product FEATURES 72 hour battery backed write cache.