In the following example, volume fetch messages are issued with the routing code equivalent of the destination classes specified:

S7

Nonscratch tape volume fetch messages.

S10

Scratch tape fetch messages.

S9

Direct-access volume fetch messages.

Also, MDS messages would identify the first 15 characters of the data set names. All nonaction messages would go to console destination S1. If necessary, one retry to mount any volume would be allowed. Allocation would occur automatically following volume fetch. Allocation order for devices would be by the order of their device numbers.

SETPARAM,FETCH=YES,TAFETCH=(S7,S10),DAFETCH=S9,DSN=15