HAT5310-20T

Synology 3.5” SATA Enterprise Series Hard Drive 20TB (HAT5310-20T)

Description

The HAT5310‑20T is a 20 TB internal hard disk drive by Synology, part of their HAT5300 / HAT5310 series of enterprise/NAS HDDs. It’s designed for 24/7 operation in NAS systems, particularly those made by Synology, with firmware and hardware integration tuned for reliability and performance.

Key Features

1. Capacity & Form Factor
   • 20 TB storage.
   • 3.5‑inch form factor.
2. Interface & Speed
   • SATA III (6 Gb/s) interface.
   • 7,200 RPM rotational speed.
   • Sustained data transfer speed up to ~281 MB/s.
3. Cache / Buffer
   • 512 MB cache.
4. Reliability & Endurance
   • MTBF (Mean Time Between Failures): ~ 2.5 million hours.
   • Workload rating: ~550 TB/year writes.
   • Built for 24/7 continuous operation.
5. Firmware & Synology System Integration
   • Automatic or “one‑click” firmware updates via Synology DSM.
   • Optimized for Synology NAS / servers: speed scaling (up to ~23% faster sequential read in Synology NAS vs “standard” drives) when multiple users / heavy sequential workloads.
6. Power Consumption
   • Idle / Active Idle draw: ~ 4.38 W.
   • During random/read‑write heavy usage: ~ 8.11 W.
7. Operating / Environmental Conditions
   • Operating temperature: ~ 5 °C to 60 °C.
   • Non‑operating (storage) temperature: about −40 °C to 70 °C.
8. Warranty
   • 5‑year limited warranty.
9. Physical & Miscellaneous
   • Dimensions: ~ 147 mm × 101.85 mm × 26.1 mm.
   • Weight: ~ 720 g.
   • Designed for enterprise/NAS usage: robustness under vibration / shock etc. Some listings mention shock tolerance and industrial‑grade standards.

Strengths & Use‑Cases

• Enterprise Reliability and Durability – For demanding 24/7 environments, rated for up to 2.5 million hours MTBF3 and up to 550 TB per year workloads
• Persistent Write Cache Technology – Minimizes the chance of data corruption in the event of sudden power loss
• Better Performance – Firmware and DiskStation Manager (DSM) optimizations improve multi-client seq. read performance by up to 23%
• One-Stop Update – Get one-click firmware updates through DSM, reducing the need for additional maintenance sessions
• For Synology, by Synology – Stringent validation and up to 500,000 hours of tests ensures maximum reliability in Synology systems
• Good for large storage volumes: archives, backups, media servers, surveillance footage.
• Tuned for Synology NAS environments — firmware integration, RAID rebuild behavior, compatibility, etc.
• Decent performance for a mechanical drive: with 7200‑RPM and high sustained transfer rate, it balances capacity vs speed.

Things to Consider / Drawbacks

• Although fast for HDDs, random access / latency still much worse than SSDs.
• Power usage is non‑trivial under load; heat and cooling must be managed in dense drive enclosures.
• Cost is higher than lower‑RPM or consumer NAS drives; premium is for reliability / enterprise features.
• Must ensure your NAS or enclosure supports the size, power draw, and firmware compatibility.