Western Digital WD Gold Enterprise Class SATA HDD
20TB WD Gold enterprise 3.5-inch SATA HDD (WD201KRYZ): 7200 RPM, 512MB cache, helium CMR with OptiNAND—built for reliable bulk storage and 24/7 arrays.
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Product overview
Released November 16, 2021, the 20TB WD Gold (WD201KRYZ) arrives with Western Digital’s OptiNAND-enabled CMR/ePMR generation in the enterprise Gold family. It’s a 3.5-inch SATA 6 Gb/s, 7200 RPM helium (HelioSeal) drive with a 512MB cache, a 550TB/year workload rating, and a 2.5M‑hour MTBF. ([tomshardware.com](https://www.tomshardware.com/news/western-digital-20tb-hdds-now-available?utm_source=openai))
Positioned in the workstation/enterprise tier, it exists to provide reliable, very high‑capacity bulk storage for 24/7 arrays. It’s well-suited to mass storage, large game libraries, and sequential media or video‑editing scratch where capacity matters more than SSD-class speed. Not discontinued as of July 2026. Unique: OptiNAND offloads metadata to onboard NAND to enable the 20TB density. ([westerndigital.com](https://www.westerndigital.com/products/internal-drives/wd-gold-sata-hdd?sku=WD201KRYZ))
- mass storage
- game library
- video-editing scratch
Product highlights
- Vibration protection technology for improved performance
- HelioSeal technology delivers high capacities with a low power draw (12TB and above)
- Energy-assisted magnetic recording (EAMR) and triple-stage actuator (TSA) (in 16TB capacities and above)
- OptiNAND technology for 20TB capacity
Specifications
- Capacity
- 20 TB
- Type
- HDD
- Form factor
- 3.5
- Hardware Interface
- SATA
- Data Transfer Rate
- 600 MB
- Read speed
- 291 MB/s
- Tdp
- 6 W
