Seagate's 44TB drives are already solving AI's storage problem

Seagate Technology's Mozaic 4+ platform now supports hard drives with up to 44TB capacity, making them the industry's highest capacity drives currently available. The drives use heat-assisted magnetic recording (HAMR) technology and are already in production with two leading hyperscale cloud providers as of March 2026.

What makes Seagate Mozaic 4+ different from standard hard drives?

Seagate's Mozaic 4+ platform uses HAMR technology, which applies a laser to momentarily heat tiny spots on the disk during writing. This allows data to be recorded in smaller, more stable magnetic regions, significantly increasing storage density compared to conventional perpendicular magnetic recording.

The platform incorporates a next-generation suspension architecture and an enhanced system-on-a-chip that enables precise recording at higher densities whilst maintaining enterprise-class reliability. Unlike previous approaches, each generation allows continued capacity gains without requiring disruptive architectural changes.

What sets this apart is Seagate's vertical integration. The company designs and manufactures its own laser technology through in-house nanophotonic engineering, giving it control over yield, reliability, and supply chain resilience.

Why does AI need massive storage capacity?

Artificial intelligence workloads generate unprecedented amounts of data that must be stored, managed, and accessed efficiently. According to Bob O'Donnell, President of TECHnalysis Research, 'massive amounts of data—both real and synthetically generated—are essential to keep AI advancements moving ahead.'

Training large language models requires storing vast datasets, whilst AI-generated content, including video and multimodal outputs, creates exponential data growth. Hyperscale cloud providers need mass-capacity storage that can economically handle these growing data pools whilst remaining accessible for retraining and fine-tuning.

The UAE's growing AI infrastructure, including initiatives such as e& Enterprise's sovereign AI services, demonstrates regional demand for high-capacity storage solutions to support local AI development.

How much more efficient are 44TB drives?

In a one-exabyte deployment scenario, Mozaic 4+ drives improve infrastructure efficiency by approximately 47% compared to standard 30TB drives. This translates to reducing the required data centre footprint by about 100 square feet and lowering annual energy consumption by roughly 0.8 million kilowatt-hours.

The efficiency gains come from higher capacity per-rack and per-watt ratios. More data fits in the same physical space whilst consuming less power, which directly impacts the total cost of ownership for hyperscale operators.

These improvements align with broader data centre efficiency trends, such as innovations in liquid cooling systems that major providers are exploring to meet AI workload demands.

What's Seagate's roadmap for future capacity?

Seagate's roadmap targets scaling from today's 4TB per-disk density to 10TB per-disk, enabling hard drive capacities up to 100TB. The company hasn't specified exact timelines, but the architecture is designed to support this progression without major overhauls.

The current 44TB capacity represents a significant step toward this goal. With additional customer qualifications underway, Seagate plans broader availability as production scales beyond the current two hyperscale cloud providers.

The company's vertical integration in photonics manufacturing should help accelerate these developments, as they control the critical laser components that enable HAMR technology's higher densities.

Seagate Mozaic 4+ availability

Seagate's Mozaic 4+ hard drives, supporting up to 44TB of capacity, are currently shipping in volume to two leading hyperscale cloud providers. The company hasn't disclosed specific pricing or named the providers involved.

Broader commercial availability is planned as production scales, but Seagate hasn't announced specific dates or regional rollout plans. UAE enterprises and cloud providers interested in these drives will need to contact Seagate directly for qualification and availability timelines.

Given the UAE's focus on AI infrastructure development, including partnerships such as du's sovereign hypercloud, local demand for high-capacity storage solutions is likely to drive discussions on regional availability.

Frequently Asked Questions

What is Seagate Mozaic 4+?

Seagate Mozaic 4+ is the company's next-generation HAMR-based storage platform that supports hard drives up to 44TB capacity. It's currently the industry's only HAMR platform deployed at enterprise scale.

What is HAMR technology and why is it important?

HAMR (Heat-Assisted Magnetic Recording) uses a laser to heat tiny spots on the disk during writing, allowing data storage in smaller magnetic regions. This significantly increases storage density compared to conventional hard drives.

What is the maximum capacity of Seagate Mozaic 4+ hard drives?

Current Mozaic 4+ hard drives support up to 44TB capacity, with Seagate's roadmap targeting future capacities up to 100TB as the technology scales.

How does Mozaic 4+ improve data centre efficiency?

Mozaic 4+ delivers 47% better infrastructure efficiency in one-exabyte deployments compared to 30TB drives, reducing data centre footprint and lowering energy consumption by approximately 0.8 million kilowatt-hours annually.

Are Mozaic 4+ drives available commercially?

Currently, Mozaic 4+ drives are shipping to two hyperscale cloud providers. Broader commercial availability is planned as production scales, but specific timelines haven't been announced.

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