CXXMAINT (Maintain Directory) › CXXMAINT FORMAT0201 (Base Level Restrict to r11 Compatible Features) › Considerations for Using FORMAT0201

Considerations for Using FORMAT0201

Only a database in FORMAT 2 that has not used features of Version 12.0 and Version 14.0 has no issues with the change from FORMAT 2 to FORMAT 1. Issues exist for each database using Version 12.0-and Version 14.0 only features. The possible issues and how to handle them are as follows:

• If an index area or data area are currently defined as having dynamic extend selected in cylinder units, the number is divided by the tracks per cylinder and the result saved as the number of tracks. However, if the number is 64k or larger, the number is set to 64k-1. This can be an issue of concern and a reason why users are asked to not use FORMAT 2 and Version 12.0 and Version 14.0 features while there is any risk of a fallback.
• If the database has Multi-Dataset Index areas, all index areas other than the IXX have the definition removed from the Directory (CXX) and the index for the table set as not loaded.