Western Digital Is Reengineering Hard Drives For AI Era
Techstrong.IT, Wednesday, February 4th, 2026
Western Digital is laying out an ambitious hard disk drive roadmap, signaling its belief that spinning media will remain a core part of AI infrastructure well into the next decade. At its Innovation Day 2026 event, Western Digital detailed a multi-year strategy built around HDD capacity increases, significant gains in performance, lower power consumption, and a software layer designed to simplify deployment at scale.
Part of that plan is a 40TB UltraSMR drive based on energy-assisted perpendicular magnetic recording, or ePMR. The company said the drive is already undergoing qualification with customers, with volume production scheduled for the second half of 2026. From there, Western Digital expects to push ePMR capacity toward 60TB by borrowing techniques developed for heat-assisted magnetic recording, while keeping power usage flat.
HAMR technology sits further out on the curve. Western Digital said HAMR-based drives are also in qualification today, with broader production beginning in 2027 and a path to roughly 100TB by the end of the decade. A key element of the strategy is that ePMR and HAMR share a common platform, allowing customers to deploy the two technologies side by side without reworking infrastructure.