Preparing for Installation › CADDSPL Linear Data Set (LDS) File Considerations › Calculating the Physical Size of the Root LDS

Calculating the Physical Size of the Root LDS

Once you have determined MAXDS value, you can use the CADDMXDS utility to determine the number of 3390 cylinders to allocate for the Root LDS file.

To execute this utility, (after your SMP Receive and Apply steps complete), enter the following from the TSO ready prompt or ISPF Option 6:

EXEC 'CAI.CAICLS0(CADDMXDS)' 'nnnnnnnn'

where n is your MAXDS value.

Information similar to the following will be displayed:

    MaxDS specified. . . . . . . . . . . : 123568
    Size required for your Root LDS. . . :   36MB
                                      or :   52 Cyls
    Maximum MAXDS for this Root LDS. . . : 129328

This sample output indicates that when specifying a MAXDS=123568 you must define your root LDS with 52 cylinders.