Flagship storage gets AI-ready, Seagate Exos X24 pushes 24 TB into the data center

Edited by ad hoc news Flagship & Bestseller Desk. Reviewed before publication on 06/15/2026 at 4:47 PM ET. Details in the imprint.

Seagate's high-capacity lineup is centered this year on the Exos X24, a 3.5-inch enterprise hard drive that packs up to 24 TB of conventional magnetic recording storage into the same rack space hyperscale customers already use. Designed for 24/7 operation in large arrays and object-storage clusters, the Exos X24 targets cloud, AI and analytics workloads that still lean on spinning disks for cost-efficient bulk capacity.

How the Seagate Exos X24 is built for dense, always-on storage

At its core, the Exos X24 is a nearline enterprise HDD family in 3.5-inch format with up to 24 TB per drive, using conventional magnetic recording instead of shingled tracks to keep random write performance predictable in mixed workloads. Seagate offers the X24 with both SATA 6 Gb/s and SAS 12 Gb/s interfaces and advertises sustained transfer rates up to roughly 285 MB/s on the highest-capacity SKUs, allowing operators to stream large datasets efficiently from dense racks or JBOD shelves. The helium-filled design and 7,200 rpm spindle speed aim to balance performance with thermals, helping maintain power consumption and acoustic levels in tightly packed data center environments, according to the official Exos X24 product overview on Seagate's website. Seagate's product page for Exos X24

Seagate positions the Exos X24 for large enterprise and hyperscale customers that need predictable 24/7 availability, rating the drive for 2.5 million hours mean time between failures and up to 550 TB per year workload rate across the range. That specification aligns with multi-petabyte deployments where drives sit behind erasure coding or RAID and spend years serving warm and cold data in object stores, data lakes or backup repositories rather than being swapped out quickly. The drives support standard data center features such as PowerChoice for granular power management, fast cache for buffering and, on selected models, hardware-based secure erase options intended to simplify drive retirement workflows when arrays are decommissioned or repurposed.

Capacity is only one axis of differentiation in the enterprise HDD market, so Seagate also emphasizes flexibility in how the Exos X24 can be integrated. Models are offered in self-encrypting, FIPS-validated and instant secure erase variants to meet different regulatory and compliance regimes from financial services to public-sector deployments. Cloud providers and OEMs can order batch-qualified drives with Seagate Secure firmware, and Seagate supports both 4Kn and 512e sector formats to fit legacy host adapters or newer storage stacks that prefer native 4 KB sectors. For operators scaling object storage for AI training pipelines, the option to mix X24 units with slightly lower-capacity Exos families within the same chassis can make it easier to step capacity up over time without wholesale platform changes.

Performance-wise, Seagate frames the Exos X24 as a workhorse rather than a low-latency tier, building it for sequential-heavy workloads where HDDs still retain a clear total-cost-of-ownership advantage over flash. Typical use cases include backup and archival tiers, media repositories, big-data clusters and AI data lakes where terabytes are read and written in large chunks rather than small, latency-sensitive transactions. With up to 10 or more platters inside the helium-filled enclosure, the areal density gains allow 24 TB in a single drive bay, meaning a 4U chassis with 90 bays can realistically approach or exceed 2 PB of raw capacity before data protection overhead. For organizations still growing on-premises deployments rather than moving everything to public cloud, that density helps keep rack footprints and power budgets in check while data volumes grow.

Competing vendors have also introduced 24 TB or higher enterprise HDDs, but the Exos X24's conventional recording, broad interface options and integration with Seagate's own Lyve-branded storage systems give Seagate a relatively straightforward upgrade path for existing customers. Storage administrators who already qualify Exos X-series drives in their standard server or JBOD platforms can generally slot X24 units into supported firmware stacks, then scale capacity by swapping older, smaller Exos models during maintenance windows. That continuity, combined with Seagate's global RMA and support channels, is designed to reduce the operational friction that often accompanies major capacity jumps in core infrastructure components.

Seagate is also tying the Exos X24 into its broader narrative around AI-ready infrastructure and the steady growth of unstructured data from logs, sensors and rich media. While GPUs and high-speed NVMe SSDs carry most of the attention in AI buildouts, the underlying datasets feeding training and inference still live primarily on cost-optimized HDD tiers before being staged into faster memory and flash. In this stack, the Exos X24 sits as the bulk storage layer that keeps exabytes of data online and durably accessible, complementing flash-based tiers rather than replacing them. For enterprises juggling a mix of on-premises and cloud storage, the drive's density can also support private-cloud builds that mirror public-cloud scale-out object storage architectures.

From a financial and strategic standpoint, high-capacity drives such as the Exos X24 are central to Seagate Technology Holdings plc's positioning in the infrastructure market, as they carry higher average selling prices and are closely tied to cloud and AI capex cycles. Recent analyst commentary has highlighted that Seagate's earnings outlook and valuation are heavily influenced by demand for these large nearline HDDs, with multiple brokerages pointing to hyperscale spending and AI data growth as key drivers for the company over the next few years. On June 15, 2026, for example, one analysis of Seagate's valuation referenced a significant premium of the trading price to its computed intrinsic value, underscoring the market's expectations for the company's high-capacity product lines. GuruFocus coverage of Seagate's valuation metrics

As a listed company, Seagate ties product updates like the Exos X24 into its broader investor messaging on AI and cloud infrastructure demand, pointing out in recent quarterly materials that nearline HDDs remain a major revenue and profit contributor alongside growing SSD and systems businesses. Shares of Seagate Technology Holdings PLC (IE00B18S7B29) trade on NASDAQ under the ticker STX; on June 13, 2026, the stock closed at $987.40, according to data shared via a recent MarketBeat summary of the company's trading range and analyst ratings. MarketBeat's latest note on Seagate's share performance

This article was a.i.-assisted and editorially reviewed. Product information without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Trading involves risk up to and including the total loss of invested capital.