Western Digital WUH722020BLE6L4 20TB 7200RPM SATA 6Gb/s 3.5in Ultrastar DC HC560 Hard Drive front view

Western Digital

Western Digital WUH722020BLE6L4 20TB 7200RPM SATA 6Gb/s 3.5in Ultrastar DC HC560 Hard Drive

Part number: WUH722020BLE6L4

Get today's price

Prices change weekly. Instant reply, final price from our team.

  • New
  • Ships from Sugar Land, Texas

Need 5+? Request a bulk quote

Overview

The Western Digital WUH722020BLE6L4 is a 20TB SATA drive in the Ultrastar DC HC560 family, sold under WD part number 0F38785. The HC560 was WD's first drive with OptiNAND, which pairs the spinning disks with a small embedded flash device that holds drive metadata. Together with energy-assisted recording and a triple-stage actuator, that lets WD fit 20TB of CMR capacity on nine disks in a standard 3.5-inch, helium-sealed body.

WD's data sheet lists a 512MB buffer, a sustained transfer rate of up to 291 MB/s, a workload rating of up to 550TB per year and a projected MTBF of 2.5 million hours. The drive is meant for cloud-style and enterprise capacity tiers: object storage, distributed file systems, backup and disaster recovery targets, and big data sets. It is not a replacement for 10K SAS drives or flash where response time matters.

WD's data sheet lists two SATA Base SE models of the 20TB HC560: WUH722020ALE6L4 (part 0F38755) and WUH722020BLE6L4 (part 0F38785), the one listed here. They are separate part numbers, so if you are matching an existing fleet or a qualified parts list, order the exact number you need. This model is 512e, uses the legacy pin 3 layout without Power Disable, and has no encryption. The SED version is WUH722020BLE6L1.

Check before ordering:

  • Interface: SATA 6Gb/s. It works on SATA ports and most SAS controllers, but dual-port designs need the SAS model.
  • Firmware support for 20TB drives in your HBA, RAID controller or NAS.
  • Trays: this is a bare drive. HPE and Dell servers need OEM carriers and may flag non-OEM firmware.
  • RAID layout: at 20TB per drive, dual parity or erasure coding is the common choice to cover long rebuilds.

Specifications

Capacity20TB
InterfaceSATA 6Gb/s
Rotational speed7200 RPM
Cache512MB data buffer
Form factor3.5-inch, 26.1mm height, helium sealed (HelioSeal)
Sector format512e (4096-byte physical sectors)
RecordingCMR with OptiNAND and EAMR, 9-disk platform
Max sustained transfer291 MB/s (277 MiB/s)
Workload ratingUp to 550TB per year
MTBF2,500,000 hours projected (0.35% AFR)
Power6.9W operating, 5.8W idle
SecurityBase (SE) model: no encryption, sanitize overwrite

Alternative part numbers

  • 0F38785

Frequently asked questions

What is the difference between WUH722020BLE6L4 and WUH722020ALE6L4?

Both are 20TB SATA Base SE models of the HC560. WD's data sheet lists them as separate model numbers with separate part numbers: 0F38785 for the BLE6L4 and 0F38755 for the ALE6L4. This listing is the BLE6L4.

What is OptiNAND?

It is WD's design that adds an embedded flash device to the hard drive to store metadata. WD says this allows more tracks per inch and therefore more capacity per disk. User data still lives on the spinning disks.

Is 0F38785 a self-encrypting drive?

No. 0F38785 is the Base (SE) version with no encryption. WD's SED part for the same drive is 0F38784 (model WUH722020BLE6L1).

Is this drive CMR?

Yes. WD's HC560 data sheet states the 20TB capacity is delivered with the CMR recording format.

Related products

Sourcing desk

Can't find a part? We source it.

Send the part number and quantity. Our team finds it and confirms your price.

  • Any OEM part number
  • New or refurbished
  • Final price confirmed by our team