The Mozaic 4+ platform from Seagate Technology (NASDAQ: STX) has reached production qualification with two leading hyperscale cloud providers, supporting hard drive capacities up to 44TB. The company made the announcement on March 4, 2026, in Singapore, marking a milestone for heat-assisted magnetic recording (HAMR) technology deployed at commercial scale.
Seagate stated that additional customer qualifications are under way. Moreover, the company’s roadmap targets scaling from the current 4+ terabytes per disk toward a future 10TB per disk, which would enable hard drive capacities of up to 100TB.
How the Mozaic 4+ Platform Works
The Mozaic 4+ platform incorporates a next-generation suspension architecture alongside an enhanced system-on-a-chip (SoC). These components enable precise recording at higher densities while maintaining enterprise-class reliability. Each platform generation delivers capacity gains without requiring disruptive architectural changes.
Seagate designs and manufactures its laser technology in-house, drawing on investment in nanophotonic engineering. The company said this vertical integration strengthens design control, improves yield, ensures reliability, and supports supply chain resilience. Vertical integration also shortens qualification timelines and supports more predictable manufacturing economics.
Mozaic 4+ Platform and AI Data Center Demands
Artificial intelligence workloads depend on retaining and accessing massive volumes of training data, historical archives, and AI-generated content, including large video and multimodal outputs. Hyperscalers rely on mass-capacity hard drives to economically store, manage, and reactivate the exponentially growing data pools that support these workloads.
The incremental per-disk capacity increases delivered by Mozaic 4+ enable cost-efficient storage that scales without increasing infrastructure footprint or energy consumption. The platform advances capacity per rack and per watt, lowering total cost of ownership and enabling organizations to preserve and reactivate data sustainably over time.
Infrastructure Efficiency Figures
In a one-exabyte deployment, Mozaic improves infrastructure efficiency by approximately 47 percent compared to standard 30TB deployments. Specifically, this reduces the required data center footprint by about 100 square feet and lowers annual energy consumption by roughly 0.8 million kilowatt-hours. Seagate stated that at AI scale, these efficiencies compound into meaningful economic advantage.
“Data has become one of the most valuable assets for enterprises, fueling business insights, enhancing productivity, and enabling competitive advantage. As the foundation of modern data center infrastructure, data storage solutions are essential to manage ever-increasing data volumes and maximize returns on investments in today’s AI-driven world. Seagate’s HAMR-based Mozaic products deliver the scale, performance, and efficiency customers need to unlock the full potential of their data.”
Dave Mosley, Chair and Chief Executive Officer, Seagate Technology
Bob O’Donnell, President of TECHnalysis Research, said that as AI models have evolved and generative AI applications have expanded, the need for massive amounts of data has become essential to keep AI advancements moving forward. O’Donnell added that companies building and using AI models have found that high-capacity hard drive technologies such as HAMR have become critical to the quality and speed of their outputs.
Availability and Market Context
Seagate’s Mozaic 4+ hard drives supporting capacities up to 44TB are now shipping in volume to two leading hyperscale cloud providers. Broader availability is planned as production continues to scale. Furthermore, a majority of the world’s largest cloud storage providers have already qualified on Seagate’s Mozaic platform, according to the company.
The data storage market continues to face pressure from accelerating data creation driven by AI workloads, generative AI applications, and multimodal content. Seagate’s HAMR-based approach represents one response to the growing demand for higher-density, lower-cost storage at hyperscale.