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Silver 3.5 inch hard drive with circuit board visible on underside

Seagate

Seagate Exos 7E8 ST6000NM021A 6TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" internal hard drive 512e

SKU CH-Y1FB-XE47Q

6 TB enterprise SATA hard drive with 7200 RPM, 256 MB cache and 512e formatting for high-capacity storage arrays

  • Total capacity6 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • Mean latency4.16 ms
  • Enterprise-grade reliability with 7200 RPM spindle speed
  • Fast data access via 256 MB cache and 4.16 ms latency
  • High-capacity 6 TB storage for demanding workloads
  • SATA 6.0 Gb/s interface enables broad system compatibility
  • Standard 3.5 inch form factor fits typical drive bays

Enterprise Capacity Drive

The Seagate Exos 7E8 ST6000NM021A is a 6TB 3.5-inch internal hard drive built for enterprise storage workloads. It operates at 7200 RPM with a 256MB cache and connects via a SATA 6.0Gb/s interface. This drive suits servers and storage arrays that require high-capacity, always-on reliability.

SATA 6.0Gb/s Interface

The SATA 6.0Gb/s interface is the single specification that determines compatibility with your host controller or backplane. The drive uses 512e sector formatting and presents a 4.16ms average latency. Verify that your system supports SATA 6.0Gb/s and 3.5-inch form factor bays before purchase.

Thermals And Power

The drive fits standard 3.5-inch bays with maximum dimensions of 147.00mm length, 101.85mm width and 26.10mm height. In normal enterprise operation the 7200 RPM spindle generates typical mechanical noise and heat output for this class. Ensure your chassis provides adequate airflow across the drive length for sustained operation.

How it compares

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

Price $251.99
Pricier than about 77% 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 $42.00 per TB
Cheaper than about 68% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineExos 7E8
Model nameST6000NM021A
Total capacity6 TB
Recommended useFor Enterprise Storage
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 height26.1 mm
Maximum width101.85 mm
Maximum length147 mm

Questions about this item

What does the 7200 RPM spindle speed mean for real-world throughput in a desktop?

The 7200 RPM rotation combined with a 256MB cache delivers sustained transfer rates suited to heavy sequential workloads such as video editing or large backups, while the 4.16ms average latency keeps random access responsive for multi-tasking.

How does the SATA 6.0Gb/s interface limit actual performance?

The SATA 6.0Gb/s link caps the theoretical maximum at 6.0 Gb/s, so the drive’s internal speed cannot exceed that ceiling; in practice you will see sequential reads and writes up to the drive’s own media rate, which stays within the SATA 6.0Gb/s envelope.

Will the 26.10mm height fit my standard 3.5-inch drive bay?

Yes, the 26.10mm height, 101.85mm width and 147.00mm length match the standard 3.5-inch form factor, so the drive mounts in any regular desktop bay or hot-swap tray using the usual four side screws.

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