ASM DiskGroup NOT Mounted in 11G R2

I was just going to create a 11G R2 RAC  database on my RHEL 5.4 two node cluster. But dbca exists stating that ASM diskgroup where I am planning to put my database files are not mounted.

When I checked status using GRID_HOME/asmca,it shows the disks as mounted. But still dbca reports the same problem

I wanted to login to ASM instance and query the V$ASM_DISKGROUP.

On Node 1, I saw that ASM instance is up.

n310 oracle [+ASM1]:ps -ef | grep smon                    oracle 355 30041 0 15:06 pts/2 00:00:00 grep smon               oracle 6730 1 0 12:51 ? 00:00:00 asm_smon_+ASM1     oracle 14649 1 0 14:30 ? 00:00:00 ora_smon_nfr1     oracle 14968 1 0 14:31 ? 00:00:00 ora_smon_nfr3

I thought I will query the V$ASM_DISKGROUP dynamic view to see the state of my ASM diskgroups.

Check the ORACLE_HOME variable from which ASM instance was started.

From the above grep command , I got the PID 6730 for ASM instance.
Go to /proc/PID/environ and check the environment variables with which the ASM instance was started.

n310 oracle [+ASM1]:cat /proc/6730/environ Here I can see the ORACLE_HOME as /app/oracle/grid.             export ORACLE_HOME=app/oracle/grid

Since now I got the ORACLE_HOME, Lets see what V$ASM_DISKGROUP shows

n310 oracle [+ASM1]:export ORACLE_SID=+ASM1     n310 oracle [+ASM1]:./bin/sqlplus / as sysasm     SQL*Plus: Release 11.2.0.1.0 Production on Tue Feb 15 16:12:43 2011     Copyright (c) 1982, 2009, Oracle. All rights reserved.     Connected to:     Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 – 64bit Production     With the Real Application Clusters and Automatic Storage Management options     SQL> select NAME,TOTAL_MB,FREE_MB,STATE from v$ASM_DISKgroup;     NAME TOTAL_MB FREE_MB STATE     —————————— ———- ———- ———–     DATA 8610 7684 MOUNTED     VOL 0 0 DISMOUNTED     SQL> alter diskgroup VOL mount;     Diskgroup altered.     SQL> select NAME,TOTAL_MB,FREE_MB,STATE from v$ASM_DISKgroup;     NAME TOTAL_MB FREE_MB STATE     —————————— ———- ———- ———–     DATA 8610 7684 MOUNTED     VOL 38170 37980 MOUNTED

Here, When I logged in as sysdba,I got the following error.

SQL> alter diskgroup VOL mount;     alter diskgroup VOL mount     *     ERROR at line 1:     ORA-15032: not all alterations performed     ORA-15260: permission denied on ASM disk group

So, I used SYSASM to do ASM management operations.

When I quered the DISKGROUP status in the second node, it shows as MOUNTED.