Seagate Unveils Industry’s Highest-Capacity Hard Drives with Next-Generation Mozaic 4+ Platform

Seagate Technology has announced the launch of its next-generation Mozaic™ 4+ platform, marking a significant milestone in mass-capacity data storage. The platform, which is the industry’s only heat-assisted magnetic recording (HAMR) solution deployed at scale, is now qualified and in volume production with two leading hyperscale cloud providers, supporting capacities of up to 44TB per drive.

The announcement, made in Singapore on 4 March, positions Seagate at the forefront of a storage revolution driven by the explosive growth of artificial intelligence workloads. With AI models demanding ever-larger pools of training data, historical archives and multimodal content, the need for cost-effective, high-density storage has become critical for hyperscale data centre operators worldwide.

Dave Mosley, Seagate’s chairman and chief executive officer, underscored the strategic importance of the technology. “Data has become one of the most valuable assets for enterprises, fuelling business insights, enhancing productivity, and enabling competitive advantage,” he said. “Seagate’s HAMR-based Mozaic products deliver the scale, performance, and efficiency customers need to unlock the full potential of their data.”

The Mozaic 4+ platform incorporates a next-generation suspension architecture and an enhanced system-on-a-chip, enabling precise recording at higher densities whilst maintaining enterprise-class reliability. Seagate has outlined a roadmap to scale from the current 4+TB per disc towards a future 10TB per disc, which would support hard drive capacities of up to 100TB — a figure that could fundamentally alter the economics of large-scale data storage.

Central to the platform’s advancement is Seagate’s vertically integrated laser technology, developed through years of investment in nanophotonic engineering. By designing and manufacturing its own laser components in-house, the company says it has strengthened control over yield, reliability and supply chain resilience — factors that are increasingly important as global data volumes surge beyond historical levels.

The efficiency gains are substantial. According to Seagate’s internal testing, a one-exabyte deployment using Mozaic drives improves infrastructure efficiency by approximately 47 per cent compared with standard 30TB deployments, reducing the required data centre footprint by roughly 100 square feet and lowering annual energy consumption by around 0.8 million kilowatt-hours.

Industry observers have echoed the significance of the development. Bob O’Donnell, President of TECHnalysis Research, noted the growing importance of storage in the AI supply chain. “Whether for large-scale model training or sophisticated fine-tuning, companies who build and use these AI models have found that high-capacity hard drive innovations like HAMR have become critical to quality and speed of their outputs,” he said.

A majority of the world’s largest cloud storage providers have already qualified on Seagate’s Mozaic platform, and additional customer qualifications are under way. Broader availability of the Mozaic 4+ drives is planned as production continues to scale.

Seagate, which is listed on the NASDAQ under the ticker STX, has been a pioneer in mass-capacity storage for more than 45 years. The company’s shares have been buoyed in recent quarters by growing confidence in the long-term demand for high-capacity drives as the AI sector expands.