Drive comparison
WD221KFGX vs WD221KRYZ
Western Digital WD Red Pro 22TB and Western Digital WD Gold 22TB, compared using published manufacturer specifications.
Western Digital
WD Red Pro 22TB
WD221KFGX
SATA 6Gb/s · 3.5-inch
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WD Gold 22TB
WD221KRYZ
SATA 6Gb/s · 3.5-inch
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Amazon US · New listing ↗ASIN B0B5W2ZM58
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What differs between these models?
- Sustained transfer (up to MB/s): WD221KFGX lists 265; WD221KRYZ lists 291.
A larger cache, higher RPM or higher advertised sequential speed alone does not establish which drive is better for your workload.
Specifications side by side
| Specification | WD221KFGX | WD221KRYZ |
|---|---|---|
| Manufacturer | Western Digital | Western Digital |
| Product family | WD Red Pro | WD Gold |
| Model number | WD221KFGX | WD221KRYZ |
| Capacity (TB) | 22 | 22 |
| RPM | 7200 | 7200 |
| Interface | SATA 6Gb/s | SATA 6Gb/s |
| Recording | CMR | CMR |
| Cache (MB) | 512 | 512 |
| Form factor | 3.5-inch | 3.5-inch |
| Workload rating (TB/year) | 550 | 550 |
| Physical sector size (bytes) | 4096 | 4096 |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 265 | 291 |
| Logical sector size (bytes) | Not recorded | 512 |
Compatibility and buying checks
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
WD221KFGX
Western Digital WD Red Pro manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.
WD221KRYZ
Western Digital WD Gold manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.