KB5063878 update for Windows 11 24H2 may cause HDD and SSD failure
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14:04, 19.08.2025
Recently, there have been reports of storage devices failing to display properly, with their data becoming inaccessible to the operating system. This situation is believed to be related to the KB5063878 update for Windows 11 24H2.
Possible causes of the problem
One possible cause of the problem is the intensity of writing to NVMe drives or hard drives when the controller load exceeds 60% and continuous writing of 50 GB occurs. This makes it highly possible for files to be damaged.
This situation may be related to a failure in the drive caching subsystem. After restarting the system, the processes repeat. And the problem occurs constantly under similar workloads.
There are cases where SSD drives based on Phison NAND controllers experience failures at low write volumes.
Possible causes are related to a WD SN770 host memory buffer (HMB) error or memory leakage in the Windows caching area with OS buffering.
Phison has responded to the current situation and plans to investigate the circumstances in detail. At this time, the affected controllers are being inspected. The company also guarantees support to partners who have encountered a malfunction.
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