A storage pool or virtual disk has entered a "Degraded" or "Unhealthy" state, preventing WMI from querying it properly.
The "Online - Data retrieval failures occurred" error is typically caused by WMI (Windows Management Instrumentation) corruption, issues with the Storage Management Provider, or issues with clustered environments. Key culprits include: A storage pool or virtual disk has entered
Did this error start appearing ?
| Root Cause Context | Primary Triggers | Key Diagnostic Tools | Recommended Actions | | :--- | :--- | :--- | :--- | | | Corrupted event log channels, missing metadata, insufficient permissions, WMI issues | Event Viewer, Registry Editor | Reset Enabled flag for problematic channels ( Kernel-IoTrace , etc.), verify cluster diagnostic policy, repair WMI, check folder permissions | | Windows Server Backup | VSS writer/provider failures, OS updates (KB5014678), corrupted backup catalog, inaccessible volumes, disk I/O errors | vssadmin , diskshadow , Event Viewer, Windows Server Backup console | Run vssadmin list writers , apply latest cumulative updates, use a domain account for SMB backups, run sfc /scannow , run chkdsk , clear backup catalog, reboot the server | | Root Cause Context | Primary Triggers |
Server Manager relies heavily on WinRM to communicate with managed nodes. Misconfigured listeners, disabled services, or strict group policies can block this communication. WMI issues | Event Viewer
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