Seagate has begun large-scale shipments of the Mozaic 4+ HDD family with a maximum capacity of 44 TB

Seagate launches production of new HAMR drives – Mozaic 4+

In the era of “paper” artificial intelligence demand for high‑capacity hard drives is growing in a predictable way, and they account for almost 90 % of revenue for industry leaders. Therefore manufacturers are eager to rapidly improve their performance.

What’s new
* The Mozaic 4+ series – the first commercially scalable data storage platform based on HAMR (Heat‑Assisted Magnetic Recording) technology worldwide.
* Drive capacity: up to 44 TB. A single magnetic platter already holds more than 4 TB, and a target of 10 TB is planned, paving the way for drives up to 100 TB.

Technological progress
* HAMR uses a laser element to locally heat part of the magnetic platter, increasing recording density.
* Seagate has been developing and manufacturing these lasers in-house, ensuring quality control and rapid delivery of new models.
* New drives feature next‑generation motors and an improved controller – this allows high recording precision without sacrificing reliability.

Customers
Two major cloud providers have already certified Mozaic 4+ and begun using them in their storage systems. Other customers will receive drives as production volumes grow.

Economic impact
* In a 1‑exabyte data center, replacing 30 TB disks with new 44 TB ones increases efficiency by almost 47 %.
* Reducing storage footprint to 10 m² and saving energy – 800,000 kWh per year.

Seagate emphasizes that high‑capacity drives are becoming critically important for AI infrastructure, and their mass deployment is already underway among the largest cloud providers.