It's possible share a disk between two diskgroups after limit the disk space in ASM?

I am not able to get a new disk in the moment and I was woldering if it's possible to share a disk between two diskgroup. I have a FRA diskgroup with a disk of 200gb and I need to add 100gb in DATA diskgroup. I have limited FRA disk to 100g: alter diskgroup FRA resize all size 100g; Then, the free space would be allocated in nother diskgroup (DATA). Is there a way to do it in ASM? I have tried in my lab, but I get the error: alter diskgroup DATA add disk 'ORCL:DATA_STB3' size 100g; (ORCL:DATA_STB3 is the disk where now I have 100gb free). ERROR at line 1: ORA-15032: not all alterations performed ORA-15029: disk 'ORCL:DATA_STB3' is already mounted by this instance If it's not possible, why can we limit ASM disk size? what situation this command is userful?