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Silver 3.5 inch bare hard drive with exposed circuit board

HGST

HGST MegaScale DC 4000.B HMS5C4040BLE641 4TB 64MB SATA 6.0Gb/s 3.5" Enterprise CoolSpin internal hard drive

SKU CH-66CA-4R8CG

Enterprise 3.5" SATA hard drive delivering 4TB capacity, 64MB cache and 800K-hour MTBF for 24×7 cloud storage arrays

  • Total capacity4 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Cache memory64 MB
  • Max height26.1 mm
  • Enterprise reliability with 800K hours MTBF
  • Continuous 24x7 operation for cloud workloads
  • 4TB capacity in standard 3.5" form factor
  • 0Gb/s SATA interface with 64MB cache
  • Advanced 512e format with dual-stage actuator

4 TB SATA enterprise drive

The HGST MegaScale DC 4000.B HMS5C4040BLE641 is a 3.5 inch internal hard drive with a 4 TB capacity and a SATA 6.0 Gb/s interface. It is built for 24x7 operation in enterprise-class, capacity-optimised applications. The bare drive includes 64 MB cache and Advanced Format 512e technology.

Suited for bulk storage arrays

This drive fits low-workload cloud storage, massive scale-out deployments, data warehousing and disk-to-disk backup. Buyers needing higher sustained throughput for transactional databases should look elsewhere. Systems limited to legacy SATA revisions will not reach the rated interface speed.

800 K hours MTBF rating

The 800 K hours MTBF figure is the key reliability metric for multi-drive environments. Dual Stage Actuator and Enhanced Rotational Vibration Safeguard support consistent performance in dense chassis. Verify that your enclosure accepts the 26.1 mm height before purchase.

How it compares

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

Price $213.99
Pricier than about 71% 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 $53.50 per TB
Cheaper than about 58% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHGST
Product lineMegaScale DC 4000.B
Model nameHMS5C4040BLE641 (0F22149)
Total capacity4 TB
Storage
Cache memory64 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.6(+/-0.25)mm
Maximum length147 mm

Questions about this item

Will the 3.5" form factor and SATA 6.0Gb/s interface let this drive drop into my older desktop chassis and motherboard?

Yes, the 3.5" form factor and SATA 6.0Gb/s interface match standard desktop bays and controllers, so the drive installs directly into existing hardware.

How can I verify the Advanced Format 512e and 64MB cache are active after installation?

Check the drive properties in your operating system or BIOS; they will report 512-byte emulation and a 64MB cache when the drive is recognised.

Since the packaging is listed as Bare Drive, what must I supply myself?

You will need to provide your own SATA data cable, SATA power cable, and 3.5" mounting screws or tray, as the bare drive includes none of these.

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