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Silver 3.5-inch SAS hard drive bare circuit board visible

Seagate

Seagate ST4000NM0025 4TB 7200 RPM SAS 12Gb/s 128MB 3.5" internal hard drive

SKU CH-36R1-8YBFE MPN ST4000NM0025

4 TB SAS 12 Gb/s enterprise hard drive with 7200 RPM, 128 MB cache and CMR technology for 24×7 bulk-data workloads

  • Total capacity4 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory128 MB

Capacity 4TB

  • 4TB capacity stores large enterprise datasets
  • 7200 RPM spindle delivers fast sequential throughput
  • 12Gb/s SAS interface enables high-speed data transfer
  • 128MB cache buffers bursts for smooth performance
  • Engineered for 24x7 workloads up to 550TB per year

Enterprise Capacity Drive

The Seagate ST4000NM0025 is a 4TB 3.5-inch internal hard drive built for enterprise storage servers and arrays. It uses conventional magnetic recording technology and a SAS 12Gb/s interface to deliver consistent performance in 24x7 bulk-data workloads.

Installation and Common Issues

The bare drive mounts in a standard 3.5-inch bay and connects via SAS data and power cables to a compatible controller or backplane. Installation fails when the host system lacks a SAS HBA or RAID card, as the drive will not operate on a standard SATA-only motherboard port.

Pre-Order Checks

Verify that your server or storage enclosure supports 12Gb/s SAS connectivity and provides the correct power connector for enterprise drives. Confirm the chassis can accommodate a 26.10mm drive height and that your RAID controller or HBA firmware is current for 4TB capacity recognition.

How it compares

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

Price $177.99
Pricier than about 65% 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 $44.50 per TB
Cheaper than about 66% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineEnterprise Capacity 3.5
Model nameST4000NM0025
Total capacity4 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory128 MB
Ports & slots
Interface typeSAS 12Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.69 kg
Package size156 × 135 × 3 mm

Other versions of this model

3 more in the same range

Questions about this item

How can I confirm the ST4000NM0025 is performing correctly after installation?

Check that the BIOS or RAID controller detects a 4000 GB SAS drive at 12 Gb/s, verify SMART data shows zero reallocated sectors, and run a full surface scan that completes without errors.

The listing says Packaging: Bare Drive — what does that include and what must I supply?

You receive only the 3.5-inch drive itself; you must provide a SAS 12 Gb/s cable, a compatible backplane or HBA, mounting screws, and a 12 V / 5 V power connector.

Which interface version should I choose for a 12 Gb/s SAS backplane?

Select the SAS 12 Gb/s model (ST4000NM0025) — it matches the backplane speed and uses the 512n sector format for direct compatibility.

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