How to configure one GRID is mentioned in the documentation, however for two GRIDs the only way is as follow:
1) Change VTSAUDIT (INCLUDE 18005,17988) => GRID3
2) F VANTAGE,REFRESH,VKGPARMS
3) Start "copy audit report"
4) Change VTSAUDIT (INCLUDE 17992,17990) => GRID4
5) F VANTAGE,REFRESH,VKGPARMS
6) Start "copy audit report"
Additional Information
Here is the documentation link for one Grid: https://docops.ca.com/ca-vantage-storage-resource-manager/14-0/en/configuring/configuring-the-tape-resource-option/configure-virtual-tape-systems https://docops.ca.com/ca-vantage-storage-resource-manager/14-0/en/configuring/system-parameters/vkgparms-parameter-descriptions-s-to-z-inclusive