Seagate
Seagate Exos X20 ST20000NM003D 20TB SAS 12Gb/s 3.5" internal hard drive
Enterprise-grade 3.5" hard drive delivering 20TB capacity with SAS 12Gb/s interface, 7200 RPM speed and 256MB cache for hyperscale storage
- InterfaceSAS 12Gb/s
- Capacity20TB
- Recording TechnologyCMR
- RPM7200 RPM
- Cache256MB
- Average Latency4.16ms
- 20 TB capacity stores more data per rack
- 7200 RPM and 256 MB cache deliver fast access
- SAS 12 Gb/s interface enables high-throughput transfers
- Helium-sealed design reduces power per terabyte
- Seagate Secure encryption protects data at retirement
Capacity and Interface
The Seagate Exos X20 ST20000NM003D is a 20 TB enterprise hard drive with a SAS 12Gb/s interface and a 3.5 inch form factor. It spins at 7200 RPM with 256 MB cache and uses CMR recording technology for consistent performance. The helium-sealed design supports high-density storage in rack environments.
Enterprise Workloads Only
This drive suits hyperscale cloud data centres, massive scale-out deployments and high-capacity RAID arrays that require sustained throughput. Buyers who need a drive for a standard desktop PC or a single-bay external enclosure will find the SAS interface incompatible with typical consumer controllers.
SAS 12Gb/s Interface
The single specification that decides fit is the SAS 12Gb/s interface, which requires a compatible host bus adapter or RAID controller with SAS ports. Without that hardware the drive cannot be connected or used.
Puntos fuertes
- 20 TB capacity stores more data per rack
- 7200 RPM and 256 MB cache deliver fast access
- SAS 12 Gb/s interface enables high-throughput transfers
- Helium-sealed design reduces power per terabyte
- Seagate Secure encryption protects data at retirement
Especificaciones
| Brand | Seagate |
|---|---|
| Series | Exos X20 |
| Model | ST20000NM003D |
| Interface | SAS 12Gb/s |
| Capacity | 20TB |
| Recording Technology | CMR |
| RPM | 7200 RPM |
| Cache | 256MB |
| Average Latency | 4.16ms |
| Features | Market-leading 20TB HDD offering the highest capacity available for more petabytes per rack* Highly reliable performance with enhanced caching, making it the logical choice 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 Maximize total cost of ownership savings through lower power and weight with helium sealed-drive design Proven helium side-sealing weld technology for added handling robustness and leak protection Digital environmental sensors to monitor i |
| Usage | For Enterprise Storage |
| Form Factor | 3.5" |
| Height (maximum) | 26.10mm |
| Width (maximum) | 101.85mm |
| Length (maximum) | 147.00mm |
Preguntas sobre este artículo
Is the 20TB capacity the right choice for a hyperscale storage array?
Yes, the 20TB helium-sealed design delivers the highest capacity per drive, maximising petabytes per rack for scalable hyperscale and cloud data centre deployments.
How does the 7200 RPM speed affect real-world throughput in a server?
The 7200 RPM spindle combined with 256MB cache and SAS 12Gb/s interface provides high sustained transfer rates and low 4.16ms average latency for large sequential workloads.
What does the SAS 12Gb/s interface limit in practice?
The SAS 12Gb/s interface caps the maximum host transfer rate at 12Gb/s and supports hot-plug capability for enterprise storage arrays and RAID enclosures.
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