Finally, Seagate will ship a single HDD with a capacity of 40TB
At a conference for investors and analysts, Seagate announced that it has begun limited shipments of a new generation of 40TB HDDs. Seagate continues to evolve the technology that underpins HDDs, and is working on development with a view to 100TB capacity.
Seagate Technology Holdings plc (STX) Seagate 2025 Investor and Analyst Conference - (Transcript) | Seeking Alpha
Seagate's insane 40TB monster drive is real, and it could change data centers forever by 2026! | TechRadar
https://www.techradar.com/pro/seagate-confirms-40tb-hard-drives-have-already-been-shipped-but-dont-expect-them-to-go-on-sale-till-2026
The 40TB HDD is a HDD that uses a technique called ' thermally assisted magnetic recording (HAMR), ' which Seagate is fully introducing. Unlike the conventional recording method called perpendicular magnetic recording (PMR) , HAMR enables high-density data storage by heating and softening the magnetic recording medium.
Seagate has achieved an areal density of 3TB per platter (magnetic disk) using a technology called 'Mozaic 3+' that uses HAMR, and in 2025 it shipped HDDs with a capacity of 36TB manufactured using the same technology.
Finally, HDD capacity reaches 30TB, Seagate announces HDD 'Exos Mozaic 3+' that adopts HAMR technology to significantly increase recording density - GIGAZINE
Mozaic uses granular iron-platinum media as its recording medium, the main advantage of which is the ability to reduce the grain size, which in turn reduces the bit size and increases the areal density.
According to Seagate, Mozaic 3 will evolve into 'Mozaic 4' with a capacity of 4TB per disk and 'Mozaic 5' with a capacity of 5TB per disk. Mozaic 4 is already in the prototype stage, and in February 2025, a limited number of 40TB HDDs using Mozaic 4 were shipped. This is a product for data centers, not for general households. Seagate will continue testing for quality assurance until 2026, and will begin full-scale production of Mozaic 4 HDDs in the first half of 2026.
Mozaic 4+ is scheduled to appear in the third quarter of 2025, 5+ from the end of 2027 to early 2028, and Mozaic 10 quality is expected to appear in approximately 2032. Mozaic 4 is scheduled to gradually expand from a 40TB configuration with 4TB per disk to 44TB in early 2027. Theoretically, it is possible to reach 15TB per disk, but to achieve this, it is said that innovation that breaks the existing framework is required.
In addition, it is said that the number of HDDs using Seagate's Mosaic 3+ shipped will exceed 1 million units as of May 2025.
In recent years, data center demands have skyrocketed to accommodate AI, with data center nearline storage projected to store approximately 7.2 zettabytes (7.2 billion TB) of new data over the next four years -- more storage capacity than the industry required in the past decade.
'We believe we are at a tipping point as technology transitions loom,' said Seagate CEO Dave Mosley. 'Our industry is no longer oversupplied with storage. We've been pretty rigorous about maintaining a healthy balance between supply and demand, and we're not going to have overcapacity like we have in the past. By the time humanity creates 400 zettabytes of data per year in 2028, we'll have shipped 50TB of hard disks.'
Seagate's Chief Commercial Officer, BS Teh, previously said that the company aims to launch a 100TB+ HDD by 2030.
Seagate's CCO announces intention to release 'HDD with capacity over 100TB' by 2030 - GIGAZINE
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