Synology HAT5310 20TB 3.5" SATA Enterprise HDD

The Synology HAT5310-20TB is a high-capacity, enterprise-grade SATA III hard disk drive designed for 24/7 heavy-duty storage in NAS, file server, surveillance, and archival environments. It offers 20 TB of raw storage, uses a 3.5-inch form factor with a SATA 6 Gb/s interface, and operates at 7,200 RPM. With a 512 MB cache, the drive delivers sustained data transfer rates up to approximately 281 MB/s under ideal conditions. Its reliability is assured with a Mean Time Between Failures (MTBF) of about 2.5 million hours, and it is rated for a high annual workload of 550 TB per year, making it suitable for continuous read/write operations. Power consumption is moderate for its class (≈ 8.11 W during active random read/write, ≈ 4.38 W idle), and its operating temperature range spans from about 5°C to 60°C. Synology backs it with a 5-year limited warranty, and it includes firmware integrations with their DSM platform (persistent write cache, drive health monitoring, firmware updates) to enhance data integrity, performance, and ease of maintenance.