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Silver 3.5 inch bare drive with exposed circuit board and SAS connector

HGST

HGST Ultrastar He8 0F23651 8TB 7200 RPM 128MB SAS 12Gb/s 3.5" internal hard drive

SKU CH-SEPT-ZGVMD MPN 0F23651

Helium-sealed enterprise drive delivers 8 TB at 7200 RPM with 128 MB cache and SAS 12Gb/s interface for high-density server storage

  • Total capacity8 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory128 MB
  • 8TB capacity in standard 3.5-inch form factor
  • 23% lower idle power than 6TB air drives
  • 44% more power efficient per terabyte
  • 7200 RPM with 128MB cache for responsive performance
  • SAS 12Gb/s interface for next-gen data-center compatibility

Enterprise capacity drive

The HGST Ultrastar He8 0F23651 is an 8TB 3.5-inch internal hard drive built for server and data-centre workloads. It spins at 7200 RPM with a 128MB cache and connects through a SAS 12Gb/s interface. Helium-filled HelioSeal technology and a 7Stac design deliver high capacity in the standard form factor.

33% capacity gain over 6TB

Compared with 6TB air-filled drives this model adds 33% more storage while cutting idle power by 23% and improving power efficiency by 44% in Watts per TB. The 12Gb/s SAS link ensures compatibility with next-generation data-centre controllers. Average seek time is 8.5ms and average latency is 4.16ms.

Suits hyperscale and distributed storage

Designed for cloud, hyperscale and massive scale-out environments running distributed file systems such as Ceph or Hadoop. Buyers needing SATA-only connectivity or a smaller 2.5-inch form factor should look elsewhere. Secure erase and self-encrypting drive options are available for deployments that require them.

How it compares

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

Price $334.99
Pricier than about 85% of the 4,938 comparable items (median $107.99).
Total capacity 8 TB
Higher than about 80% of the 2,372 comparable items (median 2 TB).
Price per TB $41.87 per TB
Cheaper than about 68% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHGST
Product lineUltrastar He8
Model nameHUH728080AL4200 (0F23651)
Total capacity8 TB
Recommended useIdeal for Servers
Performance
Rotational speed7,200 RPM
Average seek time8.5 ms
Mean write time9 ms
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 width101.6(+/-0.25)mm
Maximum length147 mm
Shipping weight1.13 kg
Package size305 × 229 × 102 mm

Questions about this item

Will the 3.5-inch form factor with 26.1mm height fit my standard server drive bay?

Yes, the drive uses a standard 3.5-inch form factor measuring 147mm long, 101.6mm wide and 26.1mm high, matching common server bays.

What is the correct way to connect the SAS 12Gb/s interface and the step installers often miss?

Attach a SAS 12Gb/s cable to the drive's dual-port connector and ensure the backplane or controller also runs at 12Gb/s; the common error is using a 6Gb/s link which halves the bus speed.

When should I expect to replace the drive given its 2M hour MTBF rating?

The 2M hour MTBF rating indicates high reliability for continuous enterprise use; plan replacement based on your workload and SMART monitoring rather than a fixed calendar interval.

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