Synology

Synology HAT5310-20T 20TB 3.5" SATA Enterprise Hard Drive

4.1 (6 reviews)

Enterprise-Grade Reliability and Performance for Synology SystemsThe Synology HAT5310-20T is a 20TB 3.5” SATA Enterprise Series Hard Drive engineered for demanding workloads and high-volume data environments. Designed specifically for Synology systems, these CMR-based drives offer superior multi-...

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*Price sourced from Amazon.com. Last updated:Jul 13, 2026.Price and availability are subject to change.

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Overview

Enterprise-Grade Reliability and Performance for Synology Systems

The Synology HAT5310-20T is a 20TB 3.5” SATA Enterprise Series Hard Drive engineered for demanding workloads and high-volume data environments. Designed specifically for Synology systems, these CMR-based drives offer superior multi-client sequential read performance and are rigorously tested to ensure maximum reliability and durability. Backed by a 5-year limited warranty, they provide peace of mind for critical data storage.

Specifications:
  • Capacity: 20TB
  • Form Factor: 3.5-inch
  • Interface: SATA 6.0 Gb/s
  • Hard Disk Type: Mechanical Hard Disk
  • Rotational Speed: 7200 RPM
  • Cache Memory: 512 MB
  • MTBF: Up to 2.5 million hours
  • Workload Rate: Up to 550 TB per year
  • Warranty: 5-Year Limited Warranty

Key Features

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

Specifications

Capacity
20TB
Form Factor
3.5 inches
Interface
SATA
Reliability Rating (MTBF)
Up to 2.5 million hours
Workload Rating
Up to 550 TB per year
Technology
Persistent Write Cache
Compatibility
Optimized for Synology systems and DSM

Pros & Cons

👍 Pros

  • Offers enterprise-grade reliability and durability, rated for up to 2.5 million hours MTBF, suitable for 24/7 operations.
  • Designed for demanding workloads, capable of handling up to 550 TB per year, ideal for intensive data environments.
  • Features Persistent Write Cache technology, which minimizes the chance of data corruption during sudden power loss.
  • Optimized firmware and DiskStation Manager (DSM) integration improve multi-client sequential read performance by up to 23%.
  • Provides a one-stop update solution through DSM, streamlining firmware updates and reducing maintenance effort.
  • Undergoes stringent validation and up to 500,000 hours of tests to ensure maximum reliability within Synology systems.
  • Offers a massive 20TB capacity, providing extensive storage for large datasets and long-term archiving needs.

👎 Cons

  • Primarily designed for Synology systems, meaning optimal performance and features might be limited when used with other brands.
  • The 20TB capacity might be overkill and more expensive for users with minimal storage needs.
  • Enterprise-grade features and reliability often come with a higher price point than consumer-grade hard drives.
  • Performance improvements from DSM optimizations are specific to Synology's operating system, not universal.
  • The hard drive is 3.5 inches, which might not fit in all enclosures or systems designed for 2.5-inch drives.
  • "MTBF" is a statistical measure and does not guarantee individual drive lifespan or prevent failure.
  • No specific read/write speed benchmarks are provided for non-sequential or single-client operations.

Frequently Asked Questions

The Synology HAT5310-20T offers a substantial 20TB storage capacity, suitable for extensive data needs.
Yes, it is built for demanding 24/7 environments, rated for up to 2.5 million hours MTBF and up to 550 TB per year workloads.
It features Persistent Write Cache technology which helps minimize the chance of data corruption in the event of sudden power loss.
Yes, the drive offers a one-stop update solution, allowing for firmware updates directly through Synology's DiskStation Manager (DSM).
Yes, it is optimized with firmware and DiskStation Manager (DSM) for Synology systems, ensuring maximum reliability and improved performance.
This is a 3.5-inch hard drive, designed for use in compatible systems and enclosures.
Yes, firmware and DSM optimizations specifically improve multi-client sequential read performance by up to 23% in Synology systems.