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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

  • InterfaceSATA 6.0Gb/s
  • Capacity6TB
  • RPM5400 RPM
  • Cache256MB
  • UsageFor NAS systems
  • Form Factor3.5"

Options 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.

Highlights

  • 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

Specifications

BrandSynology
ModelHAT3300-6T
InterfaceSATA 6.0Gb/s
Capacity6TB
RPM5400 RPM
Cache256MB
UsageFor NAS systems
Form Factor3.5"
Height (maximum)146.99mm
Width (maximum)101.85mm
Length (maximum)146.99mm
Shipping weight0.61 kg
Package size147 × 102 × 26 mm

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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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