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Maintain situational awareness when managing stand-alone or clustered Windows or Hyper-V servers with PowerStore Metro Volume. Administrators need to understand and anticipate the behavior of Windows and Hyper-V when there are changes to the disks or data I/O paths.
For example, a stand-alone or clustered server might sit indefinitely without detecting the presence of a new volume or a new (or restored) data path. A manual rescan is often required to force the server to detect changes. A failure to understand this behavior might cause unintended consequences, including service interruptions, as you manage your environment.
Perform a manual disk rescan whenever a server does not automatically detect changes to disks or data I/O paths.
When a disk rescan is needed in a failover cluster or Hyper-V cluster environment, perform the action on all server nodes in the cluster to make sure they are consistent. You can use PowerShell to automate a disk rescan on all nodes in the cluster to save time.
Administrators might need to run manual disk rescans at critical points for many operations.
For a Hyper-V cluster, place your VMs on CSVs as a best practice. Placing VMs on a regular cluster disk is supported but not recommended. CSVs are more resilient and require fewer manual disk rescans in failure scenarios.
Test your maintenance and business continuity plans to verify Windows behavior so you can work around disk and path discovery limitations. Document the critical points where manual disk rescans are needed before completing the next steps. Where possible, automate processes such as contingency plans to reduce the risk of missing steps or making mistakes due to human error.