Seagate
Seagate Cheetah NS ST3400755SSProduct 400 GB 3.5" SAS internal hard drive
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Seagate
Seagate Exos X 28TB 3.5" SATA 7200 RPM 512MB Cache ST28000NM000C
High-capacity 28 TB enterprise hard drive with 7200 RPM, 512 MB cache and SATA 6.0 Gb/s interface for hyperscale storage
- PackagingBare Drive
- InterfaceSATA 6.0Gb/s
- Capacity28TB
- RPM7200 RPM
- Cache512MB
- Average Latency4.16ms
- 28 TB capacity fits massive datasets in a single 3.5" drive
- 7200 RPM and 512 MB cache accelerate large sequential transfers
- 5 million-hour MTBF rating supports continuous enterprise workloads
- Helium side-sealing weld protects against leaks and handling stress
- SATA 6.0 Gb/s interface integrates with existing NAS and RAID arrays
28 TB Enterprise SATA Hard Drive
The Seagate Exos X 28TB is a 3.5-inch internal hard drive built for enterprise NAS and hyperscale storage. It spins at 7200 RPM with a 512MB cache and uses a SATA 6.0Gb/s interface. The helium-sealed design supports 28TB capacity in a standard form factor.
SATA 6.0Gb/s Interface Limits
The drive connects through a SATA 6.0Gb/s link, so maximum throughput cannot exceed that bus speed. Average latency is 4.16ms at 7200 RPM. Sustained transfer rates will be bounded by the SATA interface rather than the drive media.
Check Bay Space And Power Budget
Verify your chassis has a 3.5-inch bay with at least 26.10mm height, 101.85mm width and 147.00mm length clearance. Ensure the power supply delivers sufficient 12V and 5V current for a 7200 RPM helium drive. Confirm the motherboard or controller provides a SATA 6.0Gb/s port.
Highlights
- 28 TB capacity fits massive datasets in a single 3.5" drive
- 7200 RPM and 512 MB cache accelerate large sequential transfers
- 5 million-hour MTBF rating supports continuous enterprise workloads
- Helium side-sealing weld protects against leaks and handling stress
- SATA 6.0 Gb/s interface integrates with existing NAS and RAID arrays
Specifications
| Brand | Seagate |
|---|---|
| Series | Exos |
| Model | ST28000NM000C |
| Part Number | ST28000NM000C |
| Packaging | Bare Drive |
| Interface | SATA 6.0Gb/s |
| Capacity | 28TB |
| RPM | 7200 RPM |
| Cache | 512MB |
| Average Latency | 4.16ms |
| Usage | Enterprise NAS Hard Drives |
| Form Factor | 3.5" |
| Height (maximum) | 26.10mm |
| Width (maximum) | 101.85mm |
| Length (maximum) | 147.00mm |
| Shipping weight | 0.45 kg |
| Package size | 254 × 178 × 76 mm |
Questions about this item
Which capacity version of the Seagate Exos X should I choose for a high-density NAS build?
The ST28000NM000C provides 28TB in a single 3.5-inch drive, letting you reach multiple petabytes per rack with fewer bays than lower-capacity models.
What does the 7200 RPM rating mean for daily throughput in a RAID array?
At 7200 RPM with 4.16ms average latency and a 512MB cache, the drive sustains the high sequential speeds needed for large-file workloads such as backup, media ingest, and distributed file systems.
How does the SATA 6.0Gb/s interface limit real-world transfer rates?
The SATA 6.0Gb/s link caps the theoretical maximum at 6.0Gb/s, so sustained reads and writes will top out below that ceiling once protocol overhead and drive mechanics are accounted for.
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