To add freespace to the EM_GRID_01 diskgroup requires:
- freeing in-use space (e.g. drop tables, tablespaces, reduce archive logs, etc)
- adding one ore more disks/LUNs to the diskgroup (and rebalancing the diskgroup)
You cannot add space from the FRA01 (or DATA1) diskgroup to the EM_GRID_01 diskgroup. What you can do is:
- remove one or more disks/LUNs from FRA01 (and rebalance), then add these candidate disks to EM_GRID_01 - this however may not be possible given the number of disks in FRA01 and the redundancy level of FRA01
- change the database instance(s) file destination to FRA01 and adding more datafiles to tablespaces (files are created on FRA01 diskgroup) - this however may be problematic having the database instance's datafiles scattered across 2 different physical diskgroups.
The typical (and recommended IMO) option is to add more disks/LUNs to the EM_GRID_01 diskgroup.