Overview

• Microsoft says it is aware of reports tied to KB5063878 and KB5062660 and is investigating with partners, with no dedicated fix released yet.
• Incidents typically surface under sustained high write loads of roughly 50 GB on drives that are already heavily utilized, leading to vanished volumes or RAW partitions.
• Most affected drives reappear after a reboot, though some tests found SSDs that remained unusable.
• Reports cover models from Western Digital, SK Hynix, Crucial, HP and XPG, indicating the issue is not confined to a single controller vendor.
• Editors point to numerous NVMe-related changes in the update and advise avoiding large file transfers and keeping backups rather than uninstalling security patches.