NDRIVES if the number of tape drives at each station. This parameter can also be given in the station catalog and only need be given here for abnormal configurations. The value in the tape initialization information will override the number in the station catalog.
The VLBA sites and the VLA normally have 2 drives. Other sites will usually have 1.
Note that the schedule can be forced to use a single tape drive other than number 1 by setting NDRIVES=1 and TPDRIVE=N where N is the desired drive (usually 2). This is useful if, for example, tape drive 1 is out of service.
For S2 stations NDRIVES indicates the number of transports in the S2 recorder (usually 8).
NDRIVES will not be allowed to exceed the number specified in the station catalog.