Follow this procedure to migrate Oracle ASM disk groups without Oracle Cluster Registry (OCR) or voting files to Oracle ASMFD.

1. As the grid user, list the existing disk groups.

   $ $ORACLE_HOME/bin/asmcmd lsdg

2. List the disks associated with each disk group.

   $ $ORACLE_HOME/bin/asmcmd lsdsk -G diskgroup

3. Check if Oracle ASM is active.

   $ $ORACLE_HOME/bin/srvctl status asm

4. Stop the databases and dismount the disk group on all nodes.

   $ $ORACLE_HOME/bin/srvctl stop diskgroup -diskgroup diskgroup -f

5. Label all existing disks in the disk group by running the following command for each disk.

   $ $ORACLE_HOME/bin/asmcmd afd_label label disk_path --migrate

6. Scan the disks on all cluster nodes.

   $ $ORACLE_HOME/bin/asmcmd afd_scan

7. Start the databases and mount the disk group on all nodes.

   $ $ORACLE_HOME/bin/srvctl start diskgroup -diskgroup diskgroup