options
The options to use when mounting the file system. For a list of options that you can use with Network File System (NFS), see the exports(5) - Linux man page. When choosing your options, consider the following:
crossmntis used by default. If you don't specifycrossmntwhen changing the client configuration, you won't be able to see or access snapshots in your file system's snapshot directory.syncis used by default. If you instead specifyasync, the system acknowledges writes before writing to disk. If the system crashes before the writes are finished, you lose the unwritten data.