Seagate
Seagate Exos X16 ST12000NM003G 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" internal hard drive
Enterprise 12 TB 3.5" drive spins at 7200 RPM with 256 MB cache over SATA 6.0 Gb/s
- InterfaceSATA 6.0Gb/s
- Capacity12TB
- NAND Flash Memory TypeHard Drive
- RPM7200 RPM
- Cache256MB
- Average Latency4.16ms
- 12TB capacity stores massive enterprise datasets
- 7200 RPM spindle speed enables fast sequential access
- 256MB cache buffer accelerates burst workloads
- Helium-sealed design reduces power per terabyte
- Seagate Secure simplifies safe drive retirement
Enterprise capacity
The Seagate Exos X16 ST12000NM003G is a 12TB 3.5-inch hard drive built for enterprise storage arrays. It spins at 7200 RPM with a 256MB cache and connects through a SATA 6.0Gb/s interface. The helium-sealed design reduces weight and power per terabyte for large-scale deployments.
Helium-sealed build
A side-sealing weld protects the helium fill for long-term leak resistance and handling robustness. Digital environmental sensors monitor internal conditions to maintain consistent operation. The SATA connector and standard 3.5-inch mounting points allow direct installation in hot-swap bays or fixed cages without adapters.
PowerBalance thermals
The PowerBalance feature optimises watts per terabyte during sustained read and write workloads. Helium fill lowers drag on the platters, reducing acoustic output and heat generation compared with air-filled drives. Average latency sits at 4.16ms under typical enterprise access patterns.
Highlights
- 12TB capacity stores massive enterprise datasets
- 7200 RPM spindle speed enables fast sequential access
- 256MB cache buffer accelerates burst workloads
- Helium-sealed design reduces power per terabyte
- Seagate Secure simplifies safe drive retirement
Specifications
| Brand | Seagate |
|---|---|
| Series | Exos X16 |
| Model | ST12000NM003G |
| Interface | SATA 6.0Gb/s |
| Capacity | 12TB |
| NAND Flash Memory Type | Hard Drive |
| RPM | 7200 RPM |
| Cache | 256MB |
| Average Latency | 4.16ms |
| Features | Industry's first 16TB drive for 33% more petabytes per rack* Highest 16TB hard drive performance with enhanced caching, making it perfect for cloud data center and massive scale-out data center applications Hyperscale SATA model tuned for large data transfers and low latency PowerBalance feature optimizes Watts/TB Helium sealed-drive design delivers lower total cost of ownership through lower power and weight Next-generation helium side-sealing weld technology for added handling robustness and leak protection Digital environmental sensors to monitor internal drive conditions for opti |
| Usage | For Enterprise Storage |
| Form Factor | 3.5" |
| Height (maximum) | 26.11mm |
| Width (maximum) | 101.85mm |
| Length (maximum) | 147.00mm |
| Shipping weight | 0.91 kg |
| Package size | 196 × 152 × 51 mm |
Questions about this item
What maximum throughput does the SATA 6.0Gb/s interface allow on this 12TB drive?
The SATA 6.0Gb/s interface caps theoretical bandwidth at 6.0 Gb/s; real-world sequential speeds will be lower and depend on the host controller and workload.
What are the exact physical dimensions of this 3.5" Exos X16 drive?
The drive measures 147.00 mm long, 101.85 mm wide and 26.11 mm high, matching the standard 3.5" enterprise form factor.
How is the helium-sealed Exos X16 installed, and what common step is missed?
Mount the drive in a 3.5" bay using four side or bottom screws, connect SATA data and power cables, then enable AHCI mode in BIOS so the 256 MB cache and 7200 RPM performance are fully utilised.
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