Hello All: Any idea on why this may be happening? root.sh ran successfully on node 1 When running it on node 2, it fails with this error. [root@asiadbg3dev2 grid]# /app/11.2.0/grid/root.sh Running Oracle 11g root script... The following environment variables are set as: ORACLE_OWNER= oracle ORACLE_HOME= /app/11.2.0/grid Enter the full pathname of the local bin directory: [/usr/local/bin]: The contents of "dbhome" have not changed. No need to overwrite. The contents of "oraenv" have not changed. No need to overwrite. The contents of "coraenv" have not changed. No need to overwrite. Entries will be added to the /etc/oratab file as needed by Database Configuration Assistant when a database is created Finished running generic part of root script. Now product-specific root actions will be performed. Using configuration parameter file: /app/11.2.0/grid/crs/install/crsconfig_params CRS-2672: Attempting to start 'ora.cssdmonitor' on 'asiadbg3dev2' CRS-2676: Start of 'ora.cssdmonitor' on 'asiadbg3dev2' succeeded CRS-2672: Attempting to start 'ora.cssd' on 'asiadbg3dev2' CRS-2672: Attempting to start 'ora.diskmon' on 'asiadbg3dev2' CRS-2676: Start of 'ora.diskmon' on 'asiadbg3dev2' succeeded CRS-2676: Start of 'ora.cssd' on 'asiadbg3dev2' succeeded Mounting Disk Group DATA failed with the following message: *ORA-15032: not all alterations performed ORA-15017: diskgroup "DATA" cannot be mounted ORA-15003: diskgroup "DATA" already mounted in another lock name space* Configuration of ASM ... failed see asmca logs at /app/oracle_base/cfgtoollogs/asmca for details Did not succssfully configure and start ASM at /app/11.2.0/grid/crs/install/ crsconfig_lib.pm line 6464. /app/11.2.0/grid/perl/bin/perl -I/app/11.2.0/grid/perl/lib -I/app/11.2.0/grid/crs/install /app/11.2.0/grid/crs/install/rootcrs.plexecution failed DATA diskgroup is using a device that is mounted across both nodes. root.sh should not try to create the disk group on node 2. This gives the same output on both nodes [root@asiadbg3dev2 asmca]# /usr/sbin/oracleasm listdisks *FSS_POC_ASM* [root@asiadbg3dev1 crsconfig]# /usr/sbin/oracleasm querydisk /dev/emcpowerb1 *Device "/dev/emcpowerb1" is marked an ASM disk with the label "FSS_POC_ASM" * ** ** Thank you Kumar