Drive comparison
ST18000VN000 vs HDWG81JXZSTB
Seagate IronWolf 18TB and Toshiba N300 Pro 18TB, compared using published manufacturer specifications.
Seagate
IronWolf 18TB
ST18000VN000
SATA 6 Gb/s · 3.5-inch
$844.45
Amazon US · New listing ↗ASIN B0BJPPGTX4 · as of Sep 12, 2026 10:53 UTC
Full specifications & all listings →Toshiba
N300 Pro 18TB
HDWG81JXZSTB
SATA 6 Gb/s · 3.5-inch
No verified exact-model Amazon listing yet.
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What differs between these models?
- NAS bays: ST18000VN000 lists Up to 8; HDWG81JXZSTB lists 24.
- Cache (MB): ST18000VN000 lists 256; HDWG81JXZSTB lists 1024.
- Workload rating (TB/year): ST18000VN000 lists 180; HDWG81JXZSTB lists 550.
- Manufacturer limited warranty: ST18000VN000 lists 3 years (eligible new drives); HDWG81JXZSTB lists 5 years (eligible new drives).
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 | ST18000VN000 | HDWG81JXZSTB |
|---|---|---|
| Manufacturer | Seagate | Toshiba |
| Product family | IronWolf | N300 Pro |
| Model number | ST18000VN000 | HDWG81JXZSTB |
| Capacity (TB) | 18 | 18 |
| RPM | 7200 | 7200 |
| NAS bays | Up to 8 | 24 |
| Interface | SATA 6 Gb/s | SATA 6 Gb/s |
| Recording | CMR | CMR |
| Cache (MB) | 256 | 1024 |
| Form factor | 3.5-inch | 3.5-inch |
| Workload rating (TB/year) | 180 | 550 |
| Manufacturer limited warranty | 3 years (eligible new drives) | 5 years (eligible new drives) |
| Sector format | Not recorded | 512e |
| Idle power (W) | Not recorded | 4.16 |
| Package / region | Not recorded | US retail; manufacturer-documented bulk package alias |
| Average operating power (W) | Not recorded | 7.41 |
| Rotational vibration sensors | Not recorded | Yes |
| Sustained transfer (up to MB/s) | Not recorded | 294 |
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
ST18000VN000
Seagate IronWolf datasheet DS1904-20 ↗ · pages 2–3
Reviewed 2026-09-07. Published specifications; no independent benchmark or failure-rate claim.
HDWG81JXZSTB
Toshiba N300 Pro US datasheet TAEC-2839-R2.0, July 2026 ↗ · pages 4, 7
Reviewed 2026-09-08. Published specifications; no independent benchmark or failure-rate claim.