The ExpressSAS R644 RAID adapter provides 6Gb/s SAS/SATA connectivity to Direct Attached Storage via 4 external and 4 internal ports. With transfer rates of up to 1200MB/s per port, the R644 is well suited for high-bandwidth workflows, such as digital content creation, streaming video and audio, transactional databases, and email and Web servers.

The R644 combines advanced engineering and innovative features to ensure smooth data transfers and consistent performance. Leveraging ATTO’s market-tested RAID stack and exclusive latency management features, the R644 helps customers create, share and protect data and digital assets more effectively.

Advanced Data Streaming (ADS™) Technology – Latency-management technology that controls the acceleration of data transfers to move large amounts of data faster and more efficiently.

View ADS™ Technology Brief

DriveAssure™ Technology – Drive assessment and latency management technology that prevents premature drive failures to ensure uninterrupted access to data.

View DriveAssure™ Technology Brief

CacheAssure™ Technology – NV cache data protection module providing a maintenance-free solution that safeguards against the loss of cached data during a power or system failure.

View CacheAssure™ Technology Brief

Data Recovery Mode – Mechanism that increases the probability of fully or partially recovering data that is lost due to a disk failure and offline RAID group.