FDDRL supports all volumes that are also supported by the various versions of BS2000. All volumes to be processed by FDDRL must have valid labels:
The BS2000 disks must be formatted and initialized according to the valid BS2000 standards, i.e. they must have been prepared with the VOLIN utility routine (see the “Utility Routines” manual [2]). When mnemonic device names are specified, FDDRL automatically ensures that the formatting is correct.
The MTC must be initialized with the INIT utility routine (see the “Utility Routines” manual [2]) in accordance with DIN 66029.
The syntax of all statements from FDDRL is geared toward the VSNs of the volumes. As a rule, therefore, volumes are assigned via their VSNs. If volumes which have been made known to FDDRL by their VSNs in a statement are already mounted before they are requested for the first time, the BS2000 operating system recognizes the volumes automatically. In this case, only a purely informative message is output, i.e. there is no mount request.
Note on variable-sized disks
Disks of the same type can have been generated with different capacities. These disks can be copied or restored only when the output disk is at least as large as the input disk or original disk. However, this operation means that the usable capacity of the larger disk is reduced to the capacity of the smaller disk.
In a RAID disk subsystem you can use the SPACEOPT utility routine to readjust the capacity to the actual size of the logical volume (see the /ADAPT-PUBSET-SIZE command in the “SPACEOPT” manual [15]).