Synology Inc. HAT3300-6T 6TB 3.5" SATA internal hard drive

Purpose-built NAS storage

The Synology HAT3300-6T is a 6TB 3.5-inch SATA hard drive designed for always-on operation in Synology NAS systems. It targets home and small-office users who need dependable bulk storage for multi-user workloads. Conventional magnetic recording (CMR) technology provides consistent write performance across the full capacity. The drive is validated for 24/7 duty cycles in compatible Synology enclosures.

Build integration

The drive connects through a standard SATA 6.0Gb/s interface and fits 3.5-inch drive bays with maximum dimensions of 146.99mm by 101.85mm. A 256MB cache helps smooth burst traffic during concurrent access. Firmware updates are applied directly through DSM without removing the drive from the chassis. One-stop support from Synology simplifies troubleshooting when drives are used inside qualified systems.

Sustained workload behaviour

The drive carries a 180 TB per year workload rating and a 1.2 million hour MTBF figure derived from over 500,000 hours of compatibility and stress testing. CMR technology avoids the performance variability associated with shingled recording during long sequential writes. The 5400 RPM spindle speed balances throughput with acoustic and thermal output for continuous operation. Buyers needing higher annualised write volumes or faster spindle speeds should consider drives specified for heavier workloads.