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Silver 3.5 inch internal hard drive labelled Synology HAT3310-12T 12TB

Synology Inc.

Synology HAT3310-12T 12TB 7200 RPM 512MB cache 3.5" SATA internal hard drive

SKU CH-K6C4-Z8AVG MPN HAT3310-12T

A 12 TB, 7200 RPM SATA drive with 512 MB cache built for continuous NAS operation

  • InterfaceSATA 6.0Gb/s
  • Capacity12TB
  • RPM7200 RPM
  • Cache512MB
  • UsageFor NAS systems
  • Form Factor3.5"

Options 12TB

  • Designed for continuous NAS operation with 1.2 million hours MTBF
  • Handles heavy workloads rated at 180 TB per year
  • Validated through 500,000 hours of testing for reliability
  • Firmware updates applied directly inside Synology DSM
  • CMR technology delivers consistent write performance

12TB NAS drive for always-on storage

The Synology HAT3310-12T is a 12TB 3.5-inch internal hard drive built for network-attached storage systems. It spins at 7200 RPM with a 512MB cache and connects through a SATA 6.0Gb/s interface. The drive targets users who need large-capacity, continuous-operation storage in a Synology NAS environment.

CMR technology and Synology-validated firmware

Conventional magnetic recording (CMR) delivers consistent write performance without the variability of shingled recording. The unit measures 147mm long, 101.85mm wide and 26.11mm high, fitting standard 3.5-inch drive bays. Firmware updates apply directly through Synology DSM, and each drive undergoes over 500,000 hours of validation testing before shipment.

SATA interface limits sustained throughput

The SATA 6.0Gb/s link caps maximum transfer rate below what faster bus architectures can achieve. A 1.2 million hour MTBF rating and 180 TB per year workload rating describe endurance under continuous use, not peak speed. Buyers who need higher single-drive bandwidth or lower latency should consider drives on a different interface.

Highlights

  • Designed for continuous NAS operation with 1.2 million hours MTBF
  • Handles heavy workloads rated at 180 TB per year
  • Validated through 500,000 hours of testing for reliability
  • Firmware updates applied directly inside Synology DSM
  • CMR technology delivers consistent write performance

Specifications

BrandSynology
ModelHAT3310-12T
InterfaceSATA 6.0Gb/s
Capacity12TB
RPM7200 RPM
Cache512MB
UsageFor NAS systems
Form Factor3.5"
Height (maximum)26.11mm
Width (maximum)101.85mm
Length (maximum)147mm
Shipping weight0.64 kg
Package size152 × 102 × 25 mm

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Questions about this item

What throughput does the SATA 6.0Gb/s interface cap at for the HAT3310-12T?

The SATA 6.0Gb/s interface caps theoretical throughput at 6.0Gb/s; real-world sequential speeds depend on the 7200 RPM platters and 512MB cache.

What are the exact dimensions for mounting this 3.5" drive?

The drive measures 147mm long, 101.85mm wide and 26.11mm high, fitting standard 3.5" bays with matching screw holes.

How is the firmware updated on the HAT3310-12T and what step is often missed?

Firmware updates are applied directly in Synology DSM; the step often missed is running the update while the drive is installed in a compatible Synology NAS.

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