Windows Server / Hyper-V & Failover Clustering
Investigate a Cluster Shared Volume warning at the storage layer
A CSV can remain online while redirected I/O or path issues affect VM performance. Inspect its state and ownership before moving workloads.
Environment and inputs: Windows Server 2022 / 2025 baseline · Windows PowerShell with the specified role or RSAT modules; native utilities are identified in the text. Use delegated administration and elevation only where required.
Start with this check
Confirm the host, shell and access role. Replace sample names, paths, domains and interfaces with approved targets. These are diagnostic commands; assess policy and workload impact before making changes.
Get-ClusterSharedVolume | Select-Object Name, State, OwnerNodeRead the result
The summary identifies managed CSV resources. Detailed shared-volume information and cluster or storage events are needed to diagnose redirected access.
Resolve and verify
Compare path health on all relevant nodes and correlate storage errors with the workload slowdown. Repair the supported storage path and verify normal access.
Before changing production
Do not unmount or reformat a CSV during diagnosis or assume owner-node placement alone explains performance.