Type the DSN of the PDS whose allocation parameters are to be updated. This PDS is reallocated with parameters that you specify. The current version of the PDS is renamed to the DSN in the Backup PDS field.
To facilitate selection of the desired DSN, you can type any of the following syntax:
To increase or decrease the number of directory blocks allocated to the PDS, type the desired number of directory blocks.
To increase or decrease the primary space allocation of the PDS, type the desired primary allocation amount.
Note: At least one of the parameters in the Allocation section must be updated to request the reallocation of the PDS.
As the PDS is being reallocated, the current version of the PDS is renamed. If you want to specify the DSN to which the PDS is renamed, type the DSN in this field. The DSN specified must not already be on the catalog because the Backup PDS is created new by PDS reallocation process.
Tip: It is normally more convenient to leave this field blank and let the DSN for the Backup PDS be calculated for you. Field-level help contains information about the DSN that is automatically calculated when you leave this field blank.
Since any DSN typed must be for a data set that does not currently exist, wildcard and DSN List support is not available for this field.
The Backup PDS is created to preserve the original PDS, but may be deleted once it is no longer needed.
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