Exos X20 (ST20000NM000D) - Seagate Enterprise HDD
#1 in HDD · Rated 4.6
Enterprise 20TB HDD for scalable storage
Exos X20 is Seagate's 20TB enterprise-class dynamic nearline drive built for cloud-scale deployments. It leverages conventional magnetic recording (CMR) to deliver steady, predictable performance in dense data-center environments. The drive supports SATA and SAS variants and carries a 5-year warranty with enterprise-grade reliability. In 2025, Exos X20 remains a staple for hyperscale storage fleets and large NAS/SAN arrays where density and reliability matter. Compared with consumer disks, this line emphasizes long-term RW stability, rich warranty terms, and robust service options for data centers and large-scale operations.
Features
- CMR technology for consistent performance at 20TB
- 7200 RPM spindle speed with reliable throughput
- 512MB cache (model variant dependent)
- SATA 6Gb/s or SAS 12Gb/s interfaces
- 5-year warranty and enterprise support
Pros
- High-density 20TB option with enterprise reliability
- Strong warranty and service umbrella
- Broad OS/RAID compatibility
Cons
- Premium price, best value in bulk
- Over-spec for small setups