Drive comparison
HDWG51CXZSTB vs WD121KFBX
Toshiba N300 Pro 12TB and Western Digital WD Red Pro 12TB, compared using published manufacturer specifications.
Toshiba
N300 Pro 12TB
HDWG51CXZSTB
SATA 6 Gb/s · 3.5-inch
No verified exact-model Amazon listing yet.
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Western Digital
WD Red Pro 12TB
WD121KFBX
SATA 6Gb/s · 3.5-inch
$698.00
Amazon US · New listing ↗ASIN B07RTMPWD8 · as of Sep 12, 2026 11:48 UTC
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What differs between these models?
- Interface: HDWG51CXZSTB lists SATA 6 Gb/s; WD121KFBX lists SATA 6Gb/s.
- Cache (MB): HDWG51CXZSTB lists 512; WD121KFBX lists 256.
- Workload rating (TB/year): HDWG51CXZSTB lists 300; WD121KFBX lists 550.
- Sustained transfer (up to MB/s): HDWG51CXZSTB lists 281; WD121KFBX lists 240.
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 | HDWG51CXZSTB | WD121KFBX |
|---|---|---|
| Manufacturer | Toshiba | Western Digital |
| Product family | N300 Pro | WD Red Pro |
| Model number | HDWG51CXZSTB | WD121KFBX |
| Capacity (TB) | 12 | 12 |
| RPM | 7200 | 7200 |
| NAS bays | 24 | Not recorded |
| Interface | SATA 6 Gb/s | SATA 6Gb/s |
| Recording | CMR | CMR |
| Cache (MB) | 512 | 256 |
| Form factor | 3.5-inch | 3.5-inch |
| Sector format | 512e | Not recorded |
| Idle power (W) | 3.5 | Not recorded |
| Package / region | US retail; manufacturer-documented bulk package alias | Not recorded |
| Workload rating (TB/year) | 300 | 550 |
| Average operating power (W) | 6.85 | Not recorded |
| Rotational vibration sensors | Yes | Not recorded |
| Manufacturer limited warranty | 5 years (eligible new drives) | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 281 | 240 |
| Physical sector size (bytes) | Not recorded | 4096 |
Compatibility and buying checks
- Check sector-format support in the controller and operating system, particularly for native 4K (4Kn) variants.
- Compare new and renewed offers separately. The manufacturer specification does not guarantee the warranty or return policy of a marketplace seller.
Manufacturer sources
HDWG51CXZSTB
Toshiba N300 Pro US datasheet TAEC-2839-R2.0, July 2026 ↗ · pages 5, 7
Reviewed 2026-09-08. Published specifications; no independent benchmark or failure-rate claim.
WD121KFBX
Western Digital WD Red Pro manufacturer datasheet ↗
Reviewed 2026-08-21. Published specifications; no independent benchmark or failure-rate claim.