Library /sys$common/syshlp/tcpip$ucp_help.hlb MOUNT, Qualifiers, /DATA  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /DATA [= {read_bytes | write_bytes}]

    Optional. Default: /DATA=(8192,8192).

    Largest amount of NFS data received or transmitted in one network
    operation. The options mean:

    o  read_bytes - Data received. Minimum value = 512.

    o  write_bytes - Data transmitted. Minimum value = 512.

    If you specify only one value, it applies to both READ and WRITE.

    You do not need to use /DATA unless a remote NFS server imposes
    a restriction on data size. If the server requests a smaller
    transfer size than you specified, the server's requested value
    overrides the one you set.