Is setting Perennially Reserved "true" in online Cluster safe to do?
Any experience in that?
https://blogs.vmware.com/virtualblocks/2020/07/31/using-perennially-reserved-flag-wsfc-rdms/
perennially reserved normally should be configure before configuring clustered vmdk datastore; but can also be configured later if you have missed that steps or was not aware of it.
This should not cause any outage or production down concern.