/RETRIES=n

    Optional. Default: /RETRIES=0 (the client retries the request
    forever or until the server responds).

    Maximum number of read or write retries if the NFS server fails
    to respond.

    /RETRIES=0 is a close equivalent to a UNIX hard mount. If you
    attempt to abort a command or program while it is still retrying
    the I/O operation on a client device, the process enters RWAST
    state and remains in that state until the NFS server responds. A
    process in RWAST state cannot be terminated. If the server does
    not become available, the only way remove the process without
    rebooting the client host is to dismount the client device with
    the /ALL qualifier.