Synology HAT3310-12T 12TB 7200 RPM 512MB cache 3.5" SATA internal hard drive

12TB NAS drive for always-on storage

The Synology HAT3310-12T is a 12TB 3.5-inch internal hard drive built for network-attached storage systems. It spins at 7200 RPM with a 512MB cache and connects through a SATA 6.0Gb/s interface. The drive targets users who need large-capacity, continuous-operation storage in a Synology NAS environment.

CMR technology and Synology-validated firmware

Conventional magnetic recording (CMR) delivers consistent write performance without the variability of shingled recording. The unit measures 147mm long, 101.85mm wide and 26.11mm high, fitting standard 3.5-inch drive bays. Firmware updates apply directly through Synology DSM, and each drive undergoes over 500,000 hours of validation testing before shipment.

SATA interface limits sustained throughput

The SATA 6.0Gb/s link caps maximum transfer rate below what faster bus architectures can achieve. A 1.2 million hour MTBF rating and 180 TB per year workload rating describe endurance under continuous use, not peak speed. Buyers who need higher single-drive bandwidth or lower latency should consider drives on a different interface.