Toshiba · NAS
HDWG51CXZSTB
N300 Pro 12TB
SATA 6 Gb/s · 3.5-inch · CMR
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Compare alternatives ↓As an Amazon Associate I earn from qualifying purchases.The Toshiba HDWG51CXZSTB is a 12TB N300 Pro hard drive for NAS storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | HDWG51CXZSTB |
|---|---|
| Nominal capacity | 12 TB · 12000 GB |
| RPM | 7200 |
| NAS bays | 24 |
| Interface | SATA 6 Gb/s |
| Recording | CMR |
| Cache (MB) | 512 |
| Form factor | 3.5-inch |
| Sector format | 512e |
| Idle power (W) | 3.5 |
| Package / region | US retail; manufacturer-documented bulk package alias |
| Workload rating (TB/year) | 300 |
| Average operating power (W) | 6.85 |
| Rotational vibration sensors | Yes |
| Manufacturer limited warranty | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 281 |
| Documented package codes | HDWG51CUZSVB |
Source: Toshiba N300 Pro US datasheet TAEC-2839-R2.0, July 2026, pages 5, 7. Reviewed 2026-09-08. Published specifications, not our benchmark results.
What the specifications mean
- CMR recording is specified for this exact model. Check enclosure support and workload limits before installing it in an array.
- Up to 281 MB/s sustained transfer, as specified by the manufacturer. This is not a measured game-loading or random-I/O result.
- 300 TB/year workload rating. This is a workload limit, not a promise of drive lifespan or a backup guarantee.
- Rotational vibration sensors: Yes. Check the documented drive-bay limit for multi-drive enclosures.
Before ordering
Match HDWG51CXZSTB, 12TB and SATA 6 Gb/s against the selected offer. Check your system’s exact-model compatibility list and the seller’s warranty and return terms.
Amazon US listings
Exact model matches on Amazon.com. A verified ASIN identifies the product; it does not guarantee current stock. Check the selected variant, condition and seller.
No verified exact-model ASIN is linked yet. This does not establish whether the model is currently available. Compare the alternatives below and check their listings.
Same-capacity alternatives with Amazon US links
These models share the drive type, interface class and capacity. Compare their specifications and your system requirements before choosing a replacement.
Seagate · IronWolf
ST12000VNZ008
12TB · SATA 6 Gb/s · CMR
Compare with HDWG51CXZSTB →View on Amazon US ↗ASIN B08147LZFD · Check price and conditionSeagate · IronWolf
ST12000VN0007
12TB · SATA 6 Gb/s
Compare with HDWG51CXZSTB →View on Amazon US ↗ASIN B075X181C5 · Check price and conditionWestern Digital · WD Gold
WD122KRYZ
12TB · SATA 6Gb/s · CMR
Compare with HDWG51CXZSTB →View on Amazon US ↗ASIN B0DF93LR3N · Check price and conditionHDWG51CXZSTB questions answered
Is HDWG51CXZSTB CMR or SMR?
The manufacturer lists CMR recording for HDWG51CXZSTB. Other models and capacities in the same family can differ.
What connection does HDWG51CXZSTB need?
HDWG51CXZSTB uses SATA 6 Gb/s and a 3.5-inch form factor. Match both with the computer, controller or enclosure. An M.2 slot, 2.5-inch bay and 3.5-inch bay are not interchangeable.
How much usable space does HDWG51CXZSTB provide?
Its nominal capacity is 12000 GB, approximately 11175.9 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for HDWG51CXZSTB?
Manufacturer specification: 5 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.