Problem:
You want to unmount a datastore in VMware ESXi but can’t because you get an error: ‘Cannot unmount volume ‘Datastore Name: Datastore1 uuid: 5204515c-e09a154d-9e1b-001a14c85540′ because file system is busy. Correct the problem and retry the operation.’
You may also receive the error ‘The resource is in use; Call “HostDatastoreSystem.RemoveDatastore” for object datastoresystem on ESXi failed’