KB4166: Upgrading/Uninstalling Veeam Backup & Replication ...
https://www.veeam.com/kb416618.05.2021 · Veeam vPower NFS Service (VeeamNFSSvc) The invalid registry entries often occur because during the initial installation of Veeam Backup & Replication a drive with a larger amount of free space than the C:\ drive was present. This is because the installer will detect which drive has the greatest free space and uses that for the above services.
Path to NFS datastore has been changed ... - Veeam Software
https://www.veeam.com/kb288131.01.2019 · Cause The NFS datastore path having changed is a known issue in the Veeam Backup & Replication U4. Starting with Update 4, the disk with the largest capacity is selected by default to be used as the NFS datastore location. Solution Review each Repository's Mount Server settings and adjust the " Instant recovery write cache folder " as needed.