Clustered ASM instances for 11g onward can be upgraded using a rolling upgrade


ALTER SYSTEM START ROLLING MIGRATION TO number;


I want to upgrade the ASM version from 11.1.0.7 to 11.2.0.0

Alter system start rolling migration to 11.2.0.0.0;

 
Ones node rolling migration is enabled you can be shutdown, upgraded and started.

Do not perform following operation when asm is in rolling migration mode:

• Mount and dismount of the disk groups.
• Open, close, resize, and delete of database files.
• Access to local fixed views and fixed packages.

The current status of the ASM cluster can be determined using the following query.

select sys_context('sys_cluster_properties','cluster_state') from dual;

 
After upgradation on all nodes. you can stop the rolling migration

ALTER SYSTEM STOP ROLLING MIGRATION;