Engineered for top performance and reliability, the 8TB HAS5300 SAS-3 3.5" Internal Enterprise HDD from Synology has been designed to integrate with DSM and Synology hardware to delivery improved performance in enterprise deployments. The HAS5300 has passed 200,000 hours of testing on Synology hardware, has a Mean Time to Failure (MTTF) rating of 2.5 million hours, and a yearly workload rating of 550TB. Also featured is a storage capacity of 8TB, a SAS-3 12 Gb/s interface, a 256MB cache, and a rotational speed of 7200 rpm, all of which help to ensure uninterrupted data transfers with sustained speeds of up to 230 MB/s.