To fully comprehend the process, you need to understand two terms.
failover – The process of selecting a server from a list of servers that support a replicated file system. Normally, the next server in the sorted list is used, unless it fails to respond.
remap – To use a new server. Through normal use, the clients store the path name for each active file on the remote file system. During the remap, these path names are evaluated to locate the files on the new server.