Mozaic 3+

Where the Future is Read and Written

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There is a huge need for more storage.

As data continues to explode in the wake of AI productization, enterprise data centres will need to find sustainable ways to scale against limited space, power and budget. That’s where Mozaic 3+™ comes in.

Mozaic 3+ is a hard drive platform that incorporates Seagate’s unique implementation of HAMR to deliver mass-capacity storage at unprecedented areal densities of 3 TB per disk and beyond.

But it’s more than that.

Superlattice Platinum-Alloy Media

A storage layer with higher magnetic coercivity than that found in conventional drives.

Plasmonic Writer

Heats and writes the media to over 800º F and cools it back down in less than two nanoseconds.

Gen 7 Spintronic Reader

Ensures that data can be read accurately after write, and read swiftly at ultra-high areal densities.

12nm Integrated Controller

Built for data mobility and data integrity, the controller meets increasing data demands.

Superlattice Platinum-Alloy Media

A storage layer with higher magnetic coercivity than that found in conventional drives.

Plasmonic Writer

Heats and writes the media to over 800º F and cools it back down in less than two nanoseconds.

Gen 7 Spintronic Reader

Ensures that data can be read accurately after write, and read swiftly at ultra-high areal densities.

12nm Integrated Controller

Built for data mobility and data integrity, the controller meets increasing data demands.

Mozaic is a composite of the most complex nanoscale recording technologies and material science breakthroughs on the planet.

Superlattice Platinum-Alloy Media

To combat magnetic instability, we designed a superlattice structure to enable high-fidelity data inscription.

Plasmonic Writer

Discover how we use a precision-engineered laser to enable HAMR in a fraction of a second.

Gen 7 Spintronic Reader

We built the industry's smallest, most sensitive magnetic field sensor to facilitate higher data densities than ever before.

12nm Integrated Controller

This highly tailored servo-processor chip is the operational heart of Mozaic-enabled hard drives.

Today, Mozaic powers Seagate’s flagship Exos® 30 TB+ product family, with industry-leading capacity points of 30 TB and beyond.

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It's a labour of research and development, grit and determination, investment and belief.

Foreseeing a data deluge on the horizon, our team broke through the barriers of possibility. Harnessing the potential of heat-assisted magnetic recording (HAMR) for substantial areal density gains, we dedicated two decades to perfecting the process, culminating in the groundbreaking Mozaic 3+ platform.

A masterpiece of heat and light and bits.

Fuelled by HAMR, the Mozaic platform transforms data bits, packing them tighter while keeping things magnetically and thermally steady. Meaning, you can store far more data on each disk while enjoying performance and reliability that’s rock-solid as ever.

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It’s how data is stored to media at density levels that were previously inconceivable.

All while using the same material resources, and the same trusty 3.5-inch form factor.

Mozaic-integrated hard drives are 95% the same as Seagate’s other long-trusted HDDs — just elevated to the cutting edge.
Uses a single reader and quantum antenna for writing.
A unique magnetic layer handles thermal conditions.
Scaled for efficient areal density by using a special grain media formula and size.
Head health management extends the lifetime utility.
Completely compatible with existing systems.

Why Areal Density Matters

It’s an answer to the call from the ever-expanding cloud ecosystem.

And the countless exabytes it will inevitably generate.

The world's largest data centres choose mass-capacity hard drives to store 90% of their data.¹

It’s how data centre operators will be able to easily scale their infrastructure to store more exabytes in the same space.

Amounting to massive TCO savings.

Mozaic-integrated hard drives enable data centres to:

Double their storage capacity without increasing their footprint.²
Lower power consumption cost per terabyte by 45%.²
Lower per-terabyte acquisition cost.

Mozaic 3+ also places less demand on Earth’s natural resources.

And enables data centres to deliver on sustainability goals.

45% less watt per TB²
Lower weight per TB²
55% less embodied carbon per TB³

It’s an inflection point in the storage industry.

Seagate’s Mozaic 3+ is more than a technological advance — it’s a promise to sustain the inexorable growth of the digital universe.

It’s a defiant proclamation to the world that hard drives are here to stay.

And we’re just getting started.

Dive into the Tech

Our Latest Resources

White Paper

What Is Mozaic 3+, How Does It Work, and What Can It Do for My Data Centre?

Seagate's Mozaic 3+ white paper details a breakthrough in data storage, featuring HAMR technology for unparalleled areal density per disk, enabling future-ready, high-capacity hard drives.

Innovations

Why Does Areal Density Matter in the Data Center?

Learn how areal density relates to increased storage capacity and greater efficiency resulting in measurable overhead savings.

Video

Mozaic 3+ Hard Drive Platform: Where the Future Is Read and Written

The future of data storage is here. Introducing our breakthrough hard drive platform, Mozaic 3+. Our unique implementation of HAMR technology drives areal densities of 3TB/disk and beyond. Mozaic 3+ is where the future is read and written.

Systems

Exos CORVAULT

Seagate Exos^® CORVAULT^™ is a high-performing block storage system with multi-petabyte capacity, five-nines availability, hyperscale efficiencies, and breakthrough self-healing, sustainable technology.

Enterprise Drives

Exos Mozaic 3+

Discover Exos Mozaic 3+, where mass capacity, unprecedented areal density, and proven performance combine for storage that’s hyper-efficient and more sustainable than ever.

IDC Storagesphere. 2024 vs. 2025 install base, IDC Datasphere, 2024 vs. 2025 Incremental New Data Generated.
16 TB to 30 TB capacity upgrade (or 1.78 TB/Disk to 3 TB/Disk) comparing Exos 16 to Exos X 30 TB Mozaic drive, max operating power and weight.
30 TB Mozaic 3+ drive compared to a 16 TB conventional PMR drive. Embodied carbon includes emissions generated during raw material extraction, product manufacturing/assembly, and all transportation of materials from extraction through manufacturing and from manufacturing to customers.

Products

Knowledge Base

Support Downloads

Articles

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There is a huge need for more storage.

Mozaic 3+ is a hard drive platform that incorporates Seagate’s unique implementation of HAMR to deliver mass-capacity storage at unprecedented areal densities of 3 TB per disk and beyond.

But it’s more than that.

Mozaic is a composite of the most complex nanoscale recording technologies and material science breakthroughs on the planet.

Today, Mozaic powers Seagate’s flagship Exos® 30 TB+ product family, with industry-leading capacity points of 30 TB and beyond.

It's a labour of research and development, grit and determination, investment and belief.

A masterpiece of heat and light and bits.

It’s how data is stored to media at density levels that were previously inconceivable.

It’s an answer to the call from the ever-expanding cloud ecosystem.

It’s how data centre operators will be able to easily scale their infrastructure to store more exabytes in the same space.

Mozaic 3+ also places less demand on Earth’s natural resources.

It’s an inflection point in the storage industry.

It’s a defiant proclamation to the world that hard drives are here to stay.

Our Latest Resources