Seagate promises up to 44TB HAMR Hard Drives with Mozaic 4+ tech

Seagate has begun shipping its next-generation 44TB hard drives to major hyperscale cloud providers. These drives are the first to use the Mozaic 4+ platform, which leverages Heat-Assisted Magnetic Recording (HAMR) technology to achieve record-breaking storage densities. By using a nanoscale laser to heat the recording medium during writes, Seagate can pack 4.4TB of data per platter, reaching a total of 44TB in a standard 10-platter configuration.

Unlike older density-increasing methods like Shingled Magnetic Recording (SMR), HAMR does not rely on overlapping tracks. This allows the 44TB drives to maintain predictable performance under mixed read/write workloads, a critical requirement for modern data centres. While official performance specs haven't been finalised, considering Seagate's current 30+ TB drives can achieve speeds of 270MB/s, we assume a similar level of performance.

The jump to 44TB provides massive logistical advantages for enterprise users. Seagate claims that deploying these high-density drives can improve infrastructure efficiency by 47% compared to using older 30TB models. Taking an exabyte-scale deployment as an example, the new drives reduce the data centre footprint by roughly 100 square feet (9.29 m²) and decrease annual energy consumption by approximately 0.8 million kWh.

This launch places Seagate ahead of its primary competitor, Western Digital, which is currently aiming to ship 40TB units in H2 2026. Looking further ahead, Seagate's Mozaic roadmap targets an evolution to 10TB per platter, with the goal of producing 100TB hard drives by 2030.

KitGuru says: If you're a home user, don't expect to see these in your local shop anytime soon, but your cloud backups are likely about to get a lot more room to breathe.

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