Overview
The Seagate Exos 4U74 and 4U100 are purpose-built, ultra-dense SAS-4 JBOD expansion systems designed for data-centric environments at the data centre and edge. Launched in late 2025, these systems set a new standard for enterprise storage density — delivering up to 3.2 petabytes of raw capacity in a single enclosure while significantly reducing power consumption and improving thermal efficiency compared to previous generations.
Powered by Seagate's Mozaic HAMR (Heat-Assisted Magnetic Recording) technology, the Exos 4U74 and 4U100 are built to accommodate the world's highest-capacity hard drives today and tomorrow's innovations as they emerge. With SAS-4 architecture delivering double the throughput of SAS-3 systems, these enclosures keep pace with the most demanding AI, HPC, and unstructured data workloads.
Choose Your Model
Both models share the same chassis architecture, management interfaces, and feature set. The key difference is drive bay count and enclosure depth — allowing you to choose the right balance of capacity and rack footprint for your environment.
Exos 4U74
Exos 4U100
Need help choosing between the 4U74 and 4U100 for your environment? Speak to our storage specialists.
Get a quote →Key Advantages
Industry-leading capacity
3.2PB in a single enclosure — engineered to accommodate today's largest drives and tomorrow's Mozaic innovations.
Operational efficiency
30% lower power consumption and 70% improved cooling efficiency vs previous generations. Optimised airflow and best-in-class watts-per-terabyte performance.
SAS-4 performance
Double the data throughput of SAS-3 systems. Low latency and real-time responsiveness for AI, HPC, and unstructured data workloads.
Simplified deployment
Toolless access and drawer-style serviceability. Fits 1m and 1.2m rack depths. Compatible with OCP racks, standard data centres, and edge deployments.
Customisable & configurable
Support for SAS or SATA drives. Pre-configured SAS zoning for streamlined deployment. Hot-swap drives, IOMs, PSUs, fans and link expansion modules.
Enterprise-grade security
Seagate Secure component certificate. In-band SES and out-of-band Redfish API management. Compliance-ready for air-gapped and sovereign data deployments.
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Full Technical Specifications
| Specification | Detail |
|---|---|
| Operation | High Availability (SAS) / Non-High Availability (SATA or SAS) |
| Host Interface | Dual redundant I/O Modules (IOM) — 4× Mini-SAS HD port per IOM (24 Gb/s, 12 Gb/s, 6 Gb/s SAS speeds supported) |
| Drive Interface | 12 Gb/s SAS / 6 Gb/s SATA / 24 Gbps SAS SSDs |
| Max Drives | 100 × 3.5" drive bays (4U100) / 74 × 3.5" drive bays (4U74) — up to 26 SSDs |
| Management | SCSI Enclosure Services in-band / Redfish API and SSH CLI out-of-band via Ethernet |
| Cooling | 4 dual-impeller enclosure fans, front-to-rear cooling. Dual PSUs with built-in fans |
| Power Input | 200–240VAC, 50Hz/60Hz |
| Max PSU Output | 1,800W per PSU (dual PSU) — 80+ Titanium efficiency |
| Hot-swap components | Drives (HDD/SSD), IOM, PSU, fans, link expansion modules |
| Chassis height | 175.5mm / 6.91" (4U) — both models |
| Chassis width | 448.5mm / 17.66" — both models |
| Operating temperature | ASHRAE A2: 10°C to 35°C |
| Sound power | <78 dBA at 27°C ambient and nominal HDD workload |
| Safety certifications | UL 62368-1, EN 62368-1, IEC 62368-1, CE, FCC, VCCI, KC |
Built For
- Data consolidation and infrastructure refresh
- Hybrid cloud repatriation and tiered storage
- AI and ML model training, checkpointing, and long-term retention
- Edge aggregation and compliance-driven deployments
- Managed service scaling and modular expansion
- Sovereign data infrastructure requiring UK data residency
Fortuna Data supplies and supports the Seagate Exos range for UK enterprises. Get a quote or speak to our storage team about the right configuration for your environment.
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