gtpm1m15TPF V4R1 Migration Guide: 3.1 to 4.1

Formatting the General File Loader (ALDR)

Because of differences in the DASD format of the general file loader (ALDR), the same ALDR used in previous releases cannot be used. A DASD should be formatted with the SIP-produced format JCL.

You must reformat the ALDR to maintain a 4 KB program record area and to ensure that the keypoint area now precedes the program area. You do not need to put all of the required core resident programs at the front of the allocator decks because residency is specified on the allocator statement itself, rather than being determined by the position of the allocator statement. All programs, both file and core resident, reside in one area.