If you’re experiencing Event ID 5120, CSV timeouts, or VM pauses when patching S2D clusters, Microsoft has identified the cause. Here’s the workaround using Storage Maintenance Mode and ready-to-use CAU pre/post scripts.
Discovered a bug where physical disks stay in maintenance mode after applying September CU to S2D clusters. This breaks CAU patching and causes capacity issues. Here’s how to recover and avoid the problem.
Discovered a bug where S2D incorrectly sets the Performance Tier mediatype to SSD even when SSDs are assigned to cache. Learn how to check your configuration and fix it with a simple PowerShell command.
