【多选题】
A The newer version is installed in a separate Oracle Grid Infrastructure home on the same server as the existing version
B A direct upgrade can be performed only from the immediately preceding Oracle Grid Infrastructure version
C The upgrade process will automatically install all mandatory patches for the current version of Oracle Grid Infrastructure
D Only the grid user can perform the upgrade
E Existing Oracle Database instances must be shut down before starting the upgrade
F An existing Oracle base can be used.
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