How to Convert STANDARD ASM to FLEX ASM in 12C

You can convert an Oracle ASM configuration to an Oracle Flex ASM using ASMCA. This functionality is only available in an Oracle Grid Infrastructure 12c configuration. Before you convert an Oracle ASM configuration to an Oracle Flex ASM, you must ensure the following:

1. Oracle Cluster Registry (OCR) is stored in a disk group.
2. The server parameter file (SPFILE) is stored in a disk group.
3. The password file (ORAPWD file) is stored in a disk group.
4. The disk group where the OCR, SPFILE, and ORAPWD files are stored has Oracle ASM compatibility (COMPATIBLE.ASM) set to 12.1 or higher.

ASMCA also informs you if any requirement, such as storing an ORAPWD file in a disk group, has not been met before starting the conversion.

Step 1 – Configure ASM

ASM Instances page that enables you to perform operations on selected Oracle ASM instances.

Steps 2 – Specify listener port and network interface

The next page shows the Convert to Oracle Flex ASM dialog box that enables you to specify the listener port and network interface for the conversion to Oracle Flex ASM.

Step 3 – Run the scripts

The next page shows the ASM Conversion dialog box with the script that must be run.

To complete the Oracle Flex ASM conversion, ASMCA generates the converttoFlexASM.sh script that must be run as privileged user(root) only on the local node where ASMCA is running.

verify if the Flex ASM has been configured successfully from asmcmd using the command:

asmcmd> show clustermode