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Silver 3.5-inch internal hard drive with SAS connector and circuit board visible

HGST

HGST HUH728080AL4200 8TB SAS 7200 128MB 3.5" internal hard drive

SKU CH-9W2X-6TXJ2 MPN HUH728080AL4200

8 TB SAS drive spins at 7200 RPM with 128 MB cache in a 3.5" form factor

  • Total capacity8 TB
  • Interface typeSas
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7200
  • Cache memory128 MB
  • 8 TB capacity stores large datasets
  • 7200 RPM spindle delivers fast sequential access
  • 128 MB cache buffers burst workloads
  • SAS interface enables dual-port redundancy
  • 5-inch form factor fits standard drive bays

8 TB SAS enterprise hard drive

This 3.5-inch drive delivers eight terabytes of storage on a 12 Gb SAS interface. It spins at 7 200 RPM with a 128 MB cache for sustained throughput in servers and storage arrays. The HGST HelioSeal platform targets data-centre workloads that demand high capacity and consistent performance.

Thermals noise and power in normal use

Helium filling reduces internal turbulence so the drive runs cooler than air-filled equivalents at the same spindle speed. Lower drag also cuts acoustic output during heavy read and write activity. Power draw stays predictable across sequential and random workloads typical of nearline tiers.

Build integration requirements and freedoms

A standard 3.5-inch bay and a 12 Gb SAS backplane or HBA are the only hard requirements for installation. The single-port SAS connector frees PCIe slots that would otherwise host additional controllers. No special mounting rails or proprietary cabling are needed beyond common enterprise chassis hardware.

How it compares

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

Price $188.99
Pricier than about 67% 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 $23.62 per TB
Cheaper than about 90% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHGST
Part numberHUH728080AL4200
Total capacity8 TB
Performance
Rotational speed7200
Storage
Cache memory128 MB
Ports & slots
Interface typeSas
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

How do I install this 3.5-inch SAS drive and what step is often missed?

Mount the drive in a 3.5-inch bay, connect the SAS data cable and power connector, then ensure the backplane or controller recognises the 12 Gbit/s SAS link before initialising the volume.

What maintenance or replacement will this HGST HUH728080AL4200 need later?

No scheduled maintenance is required; replace the drive if SMART attributes report reallocated sectors or if the 30-day warranty period expires and you want continued coverage.

What limit appears first on this 7200 RPM SAS drive during sustained writes?

The 128 MB cache fills quickly under heavy streaming writes, after which throughput settles to the native 7200 RPM media transfer rate.

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