Lock_Timeout=seconds

    Determines the maximum time the .aij file backup operation
    will wait for the quiet-point lock and any other locks needed
    during online backup operations. When you specify the Lock_
    Timeout=seconds qualifier, you must specify the number of seconds
    to wait for the quiet-point lock. If the time limit expires, an
    error is signaled and the backup operation fails.

    When the Lock_Timeout=seconds qualifier is not specified, or if
    the value specified is 0, the .aij file backup operation waits
    indefinitely for the quiet-point lock and any other locks needed
    during an online operation.

    The Lock_Timeout=seconds qualifier is ignored if the Noquiet_
    Point qualifier is specified.