Event ID - 21101

Event Id21101
SourceMicrosoft-Windows-Hyper-V-High-Availability
DescriptionMissing or invalid VmStoreRoot resource property.
Event InformationAccording to Microsoft :
Cause :
This event is logged when missing or invalid VmStoreRoot resource property.
Resolution :
Check external data root
Check the external data root location pointed to by the virtual machine you are trying to add as a cluster resource/bring online, and then try the operation again.
Verify :
All the clustered resources are in a healthy state and failover operations are completing successfully.
Reference LinksEvent ID 21101 from Source Microsoft-Windows-Hyper-V-High-Availability

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