CSV volumes are put into "Redirected access" mode when a recovery media is created on the CSV owner Hyper-V host in Microsoft Failover Cluster

Event ID = 5125, Failover Clustering:
Cluster Shared Volume 'VolumeX' ('VolumeX') has identified one or more active filter drivers on this device stack that could interfere with CSV operations. I/O access will be redirected to the storage device over the network through another Cluster node. This may result in degraded performance. Please contact the filter driver vendor to verify interoperability with Cluster Shared Volumes. 
Active filter drivers found:
WIMMount (HSM)

1. Reboot the Hyper-V host after the Recovery Media creation to disable the WIMMount driver.
2. Stop WIMMount manually.

SERVICE_NAME: wimmount
        TYPE               : 2  FILE_SYSTEM_DRIVER
        STATE              : 1  STOPPED
        WIN32_EXIT_CODE    : 0  (0x0)
        SERVICE_EXIT_CODE  : 0  (0x0)
        CHECKPOINT         : 0x0
        WAIT_HINT          : 0x0

Direct IO will resume after a while.

If you have further questions, open a support case as follows:

1. Right-click the Veeam Endpoint Backup / Veeam Agent for Windows icon in the system tray and select Control Panel.
2. Click the Support link at the top of the window.
3. Click Technical Support to submit a support case to the Veeam Support Team directly from the product.