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Silver 3.5-inch bare hard drive with circuit board visible

Seagate

Seagate ST4000NM0065 4TB 7200 RPM SAS 12Gb/s 128MB 3.5" internal hard drive

SKU CH-4K52-WN63C MPN ST4000NM0065

4 TB 7200 RPM SAS 12 Gb/s 3.5" enterprise drive with 128 MB cache and CMR technology for 24x7 bulk-data workloads

  • Total capacity4 TB
  • Interface type512n SAS
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory128 MB
  • Enterprise capacity with industry-leading CMR technology
  • 7200 RPM and 128 MB cache for high throughput
  • 12 Gb/s SAS interface for easy RAID integration
  • Engineered for 24x7 workloads of 550 TB per year
  • Advanced Write Caching with dual processors for consistent performance

Enterprise 4 TB SAS 12Gb/s drive

The Seagate ST4000NM0065 is a 3.5-inch internal hard drive built for enterprise storage arrays and servers. It delivers 4 TB of capacity on a 12Gb/s SAS interface with a 7200 RPM spindle and 128 MB cache. Conventional magnetic recording technology ensures consistent performance in dense, multi-drive environments.

Replaces lower-capacity nearline SAS drives

This model upgrades from smaller enterprise SAS drives when bulk-data workloads demand higher density per slot. The 550 TB per year workload rating supports 24×7 operation at ten times the endurance of desktop-class drives. Advanced write caching algorithms boost efficiency for random read and write patterns.

Verify SAS backplane and 12Gb/s controller support

Confirm your chassis accepts 3.5-inch drives with a 26.10 mm height and standard SAS power and data connectors. A 12Gb/s SAS HBA or RAID controller is required to utilise the full interface speed. The 512n sector format simplifies integration into existing RAID sets without 512e or 4Kn translation overhead.

How it compares

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

Price $163.99
Pricier than about 63% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $41.00 per TB
Cheaper than about 69% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Model nameST4000NM0065
Total capacity4 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory128 MB
Ports & slots
Interface type512n SAS
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.68 kg
Package size305 × 254 × 203 mm

Questions about this item

Will the 26.10 mm height and 101.85 mm width fit a standard 3.5-inch drive bay?

Yes, the drive meets the 3.5-inch form-factor maximums of 26.10 mm height and 101.85 mm width, so it fits any standard bay and tray.

How do I connect the 12 Gb/s SAS interface, and what is the common mistake?

Attach a SAS 12 Gb/s cable to the drive's SAS port and a compatible controller; the frequent error is using a SATA-only backplane or controller that cannot negotiate the 12 Gb/s link.

When should I plan to replace this drive under a 550 TB-per-year workload?

The drive is engineered for 550 TB per year; divide your actual annual writes by 550 to estimate the service interval, then replace before that limit is reached.

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