Instantiating disk: failed

Cause :

1. Shell Linux Not Disabled.
2. ASM is not loaded.

Action :

1. Ensure your SELINUX=disabled from vi /etc/selinux/config.

2. Perform the following ..

[root@OEL5RACN2 ~]# oracleasm createdisk CRS_FILES_01 /dev/sdb1
Writing disk header: done
Instantiating disk: failed
Clearing disk header: done
[root@OEL5RACN2 ~]# oracleasm status
Checking if ASM is loaded: no
Checking if /dev/oracleasm is mounted: no

Reboot your System.

[root@OEL5RACN1 ~]# oracleasm status
Checking if ASM is loaded: yes
Checking if /dev/oracleasm is mounted: yes
[root@OEL5RACN1 ~]# oracleasm createdisk CRS_FILES_01 /dev/sdb1
Writing disk header: done
Instantiating disk: done

[root@OEL5RACN1 ~]#