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Silver 3.5-inch internal hard drive with SAS connector

HGST

HGST HUS724040ALS640Product Ultrastar 7K4000 4TB 7200 RPM SAS 6Gb/s 3.5" internal hard drive

SKU CH-E5AY-2YPJ2 MPN HUS724040ALS640Product

A 4 TB internal hard drive spinning at 7200 RPM with a 64 MB buffer and SAS 6Gb/s interface

  • Total capacity4 TB
  • Interface typeSAS 6Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • 4 TB capacity stores large datasets
  • 7200 RPM spindle speed enables fast data access
  • SAS 6Gb/s interface provides reliable enterprise connectivity
  • 64 MB buffer improves sustained transfer performance
  • 5 inch form factor fits standard drive bays

Enterprise 4TB SAS Hard Drive

The HGST Ultrastar 7K4000 is a new 3.5-inch internal hard drive with a 4TB capacity and a 7200 RPM spindle speed. It connects via a SAS 6Gb/s interface and includes a 64 MB buffer. The drive weighs approximately 1.52 lb and measures 5.8 inches in depth.

Suited for 7200 RPM SAS Environments Not

This drive suits administrators expanding SAS-based RAID or JBOD arrays who need 4TB of 7200 RPM capacity. It is not for builders whose host bus adapters or backplanes lack SAS connectivity. The 30-day manufacturer highlight indicates a limited evaluation window.

Deciding Specification SAS 6Gb/s Interface

The single specification that decides fitment is the SAS 6Gb/s interface. Your controller or backplane must support this exact standard for the drive to function. Without a compatible SAS host connection, the 4TB capacity and 7200 RPM speed cannot be utilised.

How it compares

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

Price $71.99
Cheaper 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 $18.00 per TB
Cheaper than about 93% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHGST
Part numberHUS724040ALS640
Total capacity4 TB
Performance
Rotational speed7,200 RPM
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

Should I choose the 4TB Ultrastar 7K4000 or a different capacity?

This model provides 4TB of storage. Other capacities exist in the 7K4000 series but are separate part numbers; select the 4TB version when you need that exact amount of space.

What does the 7200 RPM spindle speed deliver in a real system?

The 7200 RPM rotation gives faster random access and higher sustained throughput than slower drives, benefiting workloads such as databases or multi-user file servers.

How does the SAS 6Gb/s interface limit performance in practice?

The drive uses a SAS 6Gb/s connection, which is the standard interface for this Ultrastar 7K4000 model and determines the maximum host transfer rate.

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