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Silver 3.5-inch enterprise hard drive with exposed PCB and label showing 20TB capacity

Western Digital

Western Digital 0F38785 Ultrastar DC HC560 20TB 7200 RPM 512MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-QARK-BG7RW MPN 0F38785

A 20TB 3.5-inch enterprise hard drive with 7200 RPM, 512MB cache and SATA 6.0Gb/s interface

  • Total capacity20 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Recording methodCMR
  • Rotational speed7,200 RPM
  • Cache memory512 MB
  • Massive 20TB capacity stores enterprise datasets
  • 7200 RPM spin speed enables rapid data access
  • 512MB cache buffers heavy I/O workloads
  • CMR recording technology ensures consistent write performance
  • SATA 6.0Gb/s interface integrates with existing servers

Ultrastar DC HC560 20TB Enterprise Drive

The Western Digital Ultrastar DC HC560 0F38785 is a 20TB 3.5" internal hard drive built for enterprise storage workloads. It operates at 7200 RPM with a 512MB cache and uses a SATA 6.0Gb/s interface. Conventional magnetic recording (CMR) technology supports sustained write performance.

Suited for High-Capacity Arrays

This drive suits data centres and servers that need maximum capacity per bay and 7200 RPM throughput for bulk storage, backup targets or nearline archives. It is not for laptops or small-form-factor systems that only accept 2.5" drives, nor for desktop users who need low-noise or low-power operation.

SATA 6.0Gb/s Interface Decides Compatibility

The single specification that decides fit is the SATA 6.0Gb/s interface; the host must provide a standard SATA data and power connection. The 26.10mm height matches the standard 3.5" form factor, so any chassis or backplane designed for 3.5" enterprise drives will accept it.

How it compares

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

Price $391.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 20 TB
Higher than about 94% of the 2,372 comparable items (median 2 TB).
Price per TB $19.60 per TB
Cheaper than about 93% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWD
Product lineUltrastar DC HC560
Model name0F38785
Total capacity20 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Recording methodCMR
Cache memory512 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.6 mm
Maximum length147 mm
Shipping weight0.68 kg
Package size147 × 102 × 26 mm

Questions about this item

Does my system need a SATA 6.0Gb/s port and a 3.5" drive bay to install this 20TB Ultrastar HC560?

Yes — the drive uses the SATA 6.0Gb/s interface and the standard 3.5-inch form factor, so the host must provide a matching data port, power connector and a bay that accepts the 26.10mm height.

Can I keep using my existing SATA 3Gb/s controller with this 7200 RPM 512MB cache drive?

The drive is backward compatible with slower SATA speeds; it will operate at the controller's maximum rate while retaining its 7200 RPM spindle speed and 512MB cache.

How do I confirm the 20TB capacity and 4.16ms latency are recognised after installation?

Check the BIOS or operating-system disk utility — it should report the full 20TB capacity and the drive's model 0F38785, while SMART data will show the 4.16ms average latency specification.

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