OPTIONS(32,85) has been set for a while now under z/OS 1.13. When running the TSSOERPT, there are many successful events where the UID or GID came from BPX.DEFAULT.USER events. So under zOS 1.13, the default OMVS segment was heavily used.
After upgrading to zOS 2.1, can you let Top Secret assign an OMVS segment for regular users?
Will system type started tasks require work to get proper OMVS segment added?
Will any type of change commands need to be done to change file ownership on the OMVS side?
With zOS 2.1, you can let Top Secret assign the OMVS segment for those acids that don't have an OMVS segment. You can even let Top Secret do it for your started task ACIDs also.
The UNIQUSER and MODLUSER control options have to be set in order for Top Secret to assign the OMVS segment.
You have to look at your file ownerships in USS and change them so that users and started task ACIDs that are assigned an OMVS segment by Top Secret will be able to access the necessary files.