Seagate plans 50 TB HAMR drives for 2027 validation

During its Q4 fiscal 2026 earnings presentation, Seagate outlined a hard-drive roadmap that puts new 50 TB HAMR models into customer validation in 2027. The current Mozaic 4+ platform supports drives up to 44 TB and uses Seagate’s Heat-Assisted Magnetic Recording Technology.

By the end of 2026, Seagate expects Mozaic 4+ models to represent 50% of its HAMR exabytes shipped to customers. CFO Gianluca Romano said the company remains on track to exceed 5 TB per platter, and with Seagate flagship-tier HDDs using ten platters, that would enable 50 TB per drive. The next step is Mozaic 5+, a third-generation platform designed for +5 TB per platter density, with first drives expected to reach customers for qualification later in 2027 before OEM and data center validation.

Seagate is also targeting a lab demonstration of 10 TB per platter around 2028, which could eventually push drives close to the 100 TB range. Its broader roadmap moves from 40-44 TB in the 2027/2028 window to 50-60 TB around 2030 and past 80 TB in the 2031/2032 timeframe. Initial customers are Big Tech, enterprises and AI companies, with consumer availability likely much later, if at all.