WD Focuses on Bigger-Capacity Drives

🔑 Enhanced Key Takeaways

• •Western Digital's 40TB UltraSMR ePMR HDD, the world's highest capacity, is currently in qualification with two hyperscale customers, with volume production slated for H2 2026.[1][4]
• •Entire 2026 HDD production capacity is sold out due to firm purchase orders from top seven customers and long-term agreements extending to 2027 and 2028.[2][3]
• •HAMR HDDs are qualifying with hyperscalers for 2027 ramp-up, with roadmap to 100TB+ by 2029 and ePMR extending to 60TB using shared architecture for seamless transitions.[1][4]

🛠️ Technical Deep Dive

• •40TB UltraSMR ePMR HDD: Uses energy-assisted perpendicular magnetic recording (ePMR) with Ultra Shingled Magnetic Recording (SMR) for highest areal density; in hyperscaler qualification.[1][4]
• •HAMR HDDs: Heat-Assisted Magnetic Recording technology; common architecture with ePMR enables mixing in same chassis; scales to 100TB+ by 2029; 2027 volume production.[1][4]
• •High Bandwidth Drive and Dual Pivot design: Deliver 2x current bandwidth, up to 8x future bandwidth, and 2x I/O performance for AI workloads at HDD economics.[1]
• •Power-optimized HDD: Reduces power by 20%, narrows gap between warm/cold storage, lowers TCO and improves sustainability.[1]

🔮 Future ImplicationsAI analysis grounded in cited sources

⏳ Timeline