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SnapManager for Hyper-V

Storage performance degrades after failed backup

  • Issue

    Storage performance may degrade following a failed backup job.

  • Cause

    If the Microsoft Hyper-V VSS components experience an exception during a backup, the cluster shared volumes (CSVs) might remain in redirected I/O mode, causing I/O overhead and potential bottlenecks within the Windows Failover Cluster. This can lead to overall performance degradation, with the greatest impact to VMs residing on the CSV in redirected I/O mode.

  • Corrective action

    Contact Microsoft Support for assistance with this issue.