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Silver 3.5 inch enterprise hard drive bare drive with circuit board visible

HGST

HGST Ultrastar 7K4000 0B26887 2TB 7200 RPM 64MB SAS 6Gb/s 3.5" internal hard drive

SKU CH-DQBF-4DJ50 MPN 0B26887

Enterprise 2TB SAS drive with 7200 RPM, 64MB cache and 2.0 million hours MTBF for 24x7 operation

  • Total capacity2 TB
  • Interface typeSAS 6Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory64 MB

Model 2TB SAS 6Gb/s

  • Enterprise reliability with 2.0 million hours MTBF
  • 7200 RPM spindle delivers consistent throughput for 24x7 workloads
  • 64 MB cache absorbs burst I/O in multi-drive arrays
  • SAS 6Gb/s interface integrates with existing enterprise controllers
  • Dual Stage Actuator and RVS maintain accuracy under vibration

Enterprise 2TB SAS drive

The HGST Ultrastar 7K4000 0B26887 is a 2TB 3.5-inch internal hard drive built for 24x7 enterprise workloads. It spins at 7200 RPM with a 64MB cache and connects via a SAS 6Gb/s interface. Rated at 2.0 million hours MTBF, it suits servers and storage arrays that demand continuous availability.

Compatibility checklist

Verify that your system provides a SAS 6Gb/s backplane or controller; a SATA-only port will not support this drive. Confirm the 3.5-inch bay can accommodate the 26.1mm maximum height and that your chassis supplies adequate airflow for sustained operation. Ensure the operating system or RAID controller handles 512e sector emulation if you select that configuration.

Sustained-load behaviour

Dual Stage Actuator and Enhanced Rotational Vibration Safeguard maintain consistent throughput in multi-drive environments under continuous write pressure. The enterprise firmware prioritises steady latency over burst speed, keeping performance predictable during long backup windows or database scans. MTBF and 24x7 ratings reflect reliability under constant duty rather than intermittent use.

How it compares

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

Price $148.99
Pricier than about 60% of the 4,938 comparable items (median $107.99).
Total capacity 2 TB
Typical for this category: the median of 2,372 items is 2 TB.
Price per TB $74.50 per TB
Pricier than about 55% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHGST
Product lineUltrastar 7K4000
Model nameHUS724020ALS640 (0B26887)
Total capacity2 TB
Performance
Rotational speed7,200 RPM
Average seek time8 ms
Mean latency6Gb/s
Storage
Cache memory64 MB
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Shipping weight1.36 kg
Package size157 × 122 × 30 mm

Other versions of this model

4 more in the same range

Questions about this item

Does the bare drive include cables or a mounting bracket, or must I buy them separately?

The drive ships as a bare unit only; SAS data and power cables plus any 3.5" mounting hardware are not included and must be sourced separately.

Should I choose the 512e or 512n sector format for my RAID controller?

Both 512 byte emulation (512e) and legacy 512n configurations are offered; select the version that matches your controller's sector-size requirement.

What does the 2.0 million hour MTBF figure mean for a server running 24x7?

It is a statistical reliability rating indicating the drive is designed for continuous enterprise operation, not a guarantee of actual service life.

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