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Silver 3.5 inch internal hard drive with exposed circuit board

Seagate

Seagate IronWolf Pro 6TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" Internal Hard Drive ST6000NE0021

SKU CH-G348-X57WQ MPN ST6000NE0021

6 TB 3.5" 7200 RPM SATA NAS drive with 256 MB cache and AgileArray for multi-bay RAID

  • Total capacity6 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • 6 TB capacity stores large NAS datasets
  • 7200 RPM spindle speed delivers fast data access
  • 256 MB cache buffers heavy multi-user workloads
  • AgileArray technology optimises RAID performance in multi-bay enclosures
  • IronWolf Health Management actively monitors drive health

IronWolf Pro 6 TB NAS Drive

This 3.5-inch internal hard drive delivers 6 TB of storage on a SATA 6.0 Gb/s interface. It spins at 7 200 RPM with a 256 MB cache and is engineered for multi-bay NAS enclosures. The AgileArray firmware adds dual-plane balancing and RAID optimisation for 24 × 7 operation.

Before ordering check

Verify that your NAS or server has a free 3.5-inch drive bay and a SATA data plus power connection. Confirm the chassis can accept a drive up to 26.11 mm high, 101.85 mm wide and 146.99 mm long. Ensure the system supports SATA 6.0 Gb/s speeds for full throughput.

Build integration

The bare drive weighs roughly 1.72 lb and mounts in standard 3.5-inch trays using four side screws. It draws power from a standard SATA power connector and requires no extra cabling. Rotational-vibration sensors and a 300 TB per year workload rating suit always-on arrays. IronWolf Health Management and a two-year Rescue Data Recovery plan add monitoring and recovery support.

How it compares

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

Price $154.99
Pricier than about 61% 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 $25.83 per TB
Cheaper than about 88% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineIronWolf Pro
Model nameST6000NE0021
Total capacity6 TB
Recommended useEnterprise NAS Hard Drives
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.11 mm
Maximum width101.85 mm
Maximum length146.99 mm
Shipping weight0.77 kg
Package size164 × 130 × 38 mm

Questions about this item

Does the bare-drive package include any cables or mounting brackets?

The drive ships as a bare unit only; SATA data and power cables plus any 3.5" mounting hardware must be sourced separately.

When should I choose the 6TB 7200 RPM model over a lower-capacity IronWolf Pro?

Pick this 6TB model when you need the 300TB per year workload rating and 1.2M hour MTBF in a multi-bay NAS that demands 24x7 operation.

What does the 256MB cache and 7200 RPM spindle speed deliver in an actual NAS array?

The 256MB buffer and 7200 RPM rotation combine with AgileArray dual-plane balancing and RV sensors to sustain high-throughput RAID workloads with low 4.16ms average latency.

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