Change the redundancy of the Disk Group of the ASM instance

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You want to change the redundancy of the Disk Group of the ASM instance. Current situation:   If you try to dismount/drop: Why? Because the ASM instance has its spfile on it: [grid@ora-asm:+ASM ~]$ asmcmd ASMCMD> spget +DATA/asm/asmparameterfile/registry.253.907250463 How to procede then Firts, you need to add another diskgroup (VOL3): [root@ora-asm ~]# oracleasm createdisk VOL3 […]