Seagate Exos
A market‑leading enterprise SAS HDD engineered for hyperscale cloud and data‑intensive applications. Features 12Gb/s SAS interface with up to 32TB CMR capacity and industry‑leading areal density (3TB/platter). Helium sealed‑drive design with PowerBalance™ technology delivers excellent W/TB efficiency. Offers 2.5M‑hour MTBF and 5‑year warranty. Ideal for dense RAID, erasure‑coded storage, distributed file systems, and enterprise backup.
Request a quote
The form carries the selected model, capacity and page link into the request.
Key Features
Unmatched capacity
Up to 32TB of storage in an industry-standard 3.5-inch form factor delivers capacity at scale while optimizing space utilization in data centers.
Breakthrough areal density
Exos hard drives now boast an industry-leading 3TB per platter, enabling massive storage capacity in the same footprint for maximized AI-driven data center efficiency.
Time-tested excellence meets next-gen innovation
The latest generation of Exos blends 90% of trusted, proven components from previous generations with cutting-edge Mozaic™ technology.
Enterprise-class reliability
Designed for the stringent demands of cloud service providers and enterprise data centers, Exos drives deliver durable, always-on performance essential for critical enterprise applications and backed by a 5-year limited warranty and 2.5M-hr MTBF rating.
Proven helium side-sealing weld technology
For added handling, robustness, and leak protection.
Sustainability
Built with more renewable energy and recycled materials than any previous Seagate product, the latest generation of Exos drives enable businesses to align with their sustainability initiatives while reducing environmental impact. Additionally, the PowerBalance™ feature optimizes watts per terabyte.
Compatibility and interoperability
Maintains the same form factor, interface, and cooling as previous generations, simplifying integration into existing infrastructure and reducing upgrade complexities.
Efficient cooling
Engineered for optimal heat dissipation, ensuring reliable performance without increasing cooling requirements in your data center.
Seagate Secure™
Built-in reliable data protection enhances security, safeguarding your data against threats in enterprise environments.
Seagate Exos product details
Official product imagery — specifications, design and interfaces at a glance.
Product Information
A market‑leading enterprise SAS HDD engineered for hyperscale cloud and data‑intensive applications. Features 12Gb/s SAS interface with up to 32TB CMR capacity and industry‑leading areal density (3TB/platter). Helium sealed‑drive design with PowerBalance™ technology delivers excellent W/TB efficiency. Offers 2.5M‑hour MTBF and 5‑year warranty. Ideal for dense RAID, erasure‑coded storage, distributed file systems, and enterprise backup.
Use the media gallery, selected capacity and specification matrix to confirm fit before sending a quote or sample request.
Technical Specifications
| Form Factor | 3.5-inch |
|---|---|
| Interface | SAS 12 Gb/s |
| Rotational Speed | 7200 RPM |
| Cache Size | 256MB |
| Sustained Transfer Rate | up to 255MB/s |
| Average Latency | 4.16 ms |
| Sector Format | 512e/4KN |
| MTBF | 2,000,000 hours |
| AFR (Annualized Failure Rate) | 0.0044 |
| Power (Active / Idle) | 11.34W/7.24W |
| Operating Temperature | 5 °C to 60 °C |
| Weight | 716g |
| Warranty | 5-year limited |
User Guide / Documents
Manufacturer datasheets, manuals and compliance files are shared only when the approved file is available for the confirmed RFQ.
Warranty & Support
Warranty, firmware, batch documentation and RMA terms are confirmed in the written quotation or sales contract. ByteExo coordinates after-sales support through the listed manufacturer channel and the customer's confirmed order record.
Procurement FAQ
What is the difference between NL-SAS and SATA HDD?
NL-SAS (Near-Line SAS) drives use a SAS 12Gb/s interface instead of SATA 6Gb/s. Key advantages include: dual-port connectivity for redundant path failover (critical for enterprise SAN), higher interface bandwidth (12Gb/s vs 6Gb/s), full-duplex data transfer, and compatibility with SAS expanders and RAID controllers. NL-SAS is the preferred choice for mission-critical storage arrays.
What NL-SAS series do you offer?
WD Ultrastar HC (HC320 8TB, HC550 16TB, HC560 20TB, HC580 24TB), Seagate Exos (8TB, 16TB, 20TB, 24TB, SAS 12Gb/s), and Toshiba MG (MG08 8TB, MG10 20TB, MG11 24TB, SAS 12Gb/s). All are 3.5-inch, 7200 RPM.
What is dual-port SAS and why does it matter?
SAS drives have two independent data ports, allowing simultaneous connection to two separate SAS controllers or expanders. If one controller or cable fails, the array automatically switches to the second path with no data loss or downtime. This makes NL-SAS the required interface for enterprise SAN and mission-critical RAID deployments where path redundancy is mandatory.
What capacities are available?
8TB, 16TB, 20TB, and 24TB across all three brands. WD Ultrastar HC580 and Seagate Exos X both reach 24TB. Availability may vary by capacity — contact us for lead time on specific models.
What is the sustained transfer rate?
Transfer rates range from 248 MB/s (Toshiba MG08 8TB) to 298 MB/s (WD Ultrastar HC580 24TB). Seagate Exos SAS models reach up to 285 MB/s. Higher-capacity drives deliver higher sustained throughput.
What RAID controllers are compatible with these drives?
Compatible with enterprise SAS RAID controllers including Broadcom/LSI MegaRAID, HPE Smart Array, Dell PERC, and Adaptec SmartRAID series, as well as SAS expander topologies for high-density JBOD and SAN configurations. Please confirm your controller's supported drive list.
What recording technology do these drives use?
WD Ultrastar HC320 and HC580 use CMR. HC550 and HC560 use EAMR (Energy-Assisted Magnetic Recording), an enterprise variant of PMR using microwave assistance for higher areal density while maintaining CMR-level RAID reliability. Seagate Exos and Toshiba MG recording technology varies by model.
What is the MTBF and warranty?
WD Ultrastar HC550/560/580 and Seagate Exos 16TB+: 2,500,000 hours MTBF, 5-year warranty. WD Ultrastar HC320 and Seagate Exos 8TB: 2,000,000 hours MTBF, 5-year warranty. Toshiba MG SAS: 2,500,000 hours MTBF, 5-year warranty.
What is the power consumption?
Active power: approximately 8.1W (Toshiba MG11) to 11.3W (Seagate Exos 8TB). Idle power: 4.3W to 7.4W. For high-density enclosures, calculate total enclosure power draw based on drive count and cooling capacity.
What is the typical use case for NL-SAS HDDs?
Enterprise SAN storage arrays, high-availability RAID groups, data warehousing, backup repositories, and large-scale object storage platforms (Ceph, MinIO). Any environment requiring dual-path redundancy, SAS expander scalability, or integration with enterprise RAID controllers should use NL-SAS over SATA.
Compare Models in This Series
3 models — comparing key specifications to help with model selection.
| Model | Interface | Form Factor | Seq Read | Seq Write | Capacities | DWPD | MTBF |
|---|---|---|---|---|---|---|---|
| WD Ultrastar | SAS 12Gb/s | 3.5-inch | — | — | 8TB–24TB | — | 2,000,000 hours |
| Seagate Exos | SAS 12 Gb/s | 3.5-inch | — | — | 8TB–24TB | — | 2,000,000 hours |
| Toshiba MG | SAS 12Gb/s | 3.5-inch | — | — | 8TB–24TB | — | 2,500,000 hours |
Brand-original, incoming-inspected
Every unit is brand-original from the listed manufacturer and incoming-inspected before dispatch. RFQ documentation can include manufacturer datasheets and compliance files when available.
Other models in Nearline SAS HDD
Tell us your models, capacities and volume
Our team replies within one business day with availability and tiered pricing. Reach us by email, phone or WhatsApp.
Get a Quote