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Silver 3.5-inch SATA hard drive with green circuit board visible

Synology Inc.

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

SKU CH-CGHH-PHETV MPN HAT3300-6T

A 6 TB 3.5" SATA drive built for 24/7 NAS use with 180 TB/year workload rating and 1.2 million hours MTBF

  • Total capacity6 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed5,400 RPM
  • Cache memory256 MB
  • Max height146.99 mm

Capacity 6TB

  • 6TB capacity stores large NAS datasets
  • 256MB cache accelerates frequent read operations
  • 5400 RPM balances throughput with 24/7 reliability
  • CMR technology delivers consistent write performance
  • 180 TB/year workload rating supports heavy multi-user loads

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.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $222.99
Pricier than about 73% of the 4,938 comparable items (median $107.99).
Total capacity 6 TB
Higher than about 75% of the 2,372 comparable items (median 2 TB).
Price per TB $37.17 per TB
Cheaper than about 73% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSynology
Model nameHAT3300-6T
Total capacity6 TB
Recommended useFor NAS systems
Performance
Rotational speed5,400 RPM
Storage
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height146.99 mm
Maximum width101.85 mm
Maximum length146.99 mm
Shipping weight0.61 kg
Package size147 × 102 × 26 mm

Other versions of this model

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Questions about this item

What is the annual workload rating for the HAT3300-6T?

The drive is rated for 180 TB per year of data written, read, or verified.

What power draw and noise should I expect from the 5400 RPM drive during 24/7 operation?

The 5400 RPM motor and CMR technology are designed for continuous operation with managed heat and acoustic output.

Does the HAT3300-6T require a Synology NAS running DSM for firmware updates?

Firmware updates are performed directly through Synology DSM on compatible Synology systems.

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