While an attempt to create a disk, I got the follow error: ” Instantiating disk: failed”. Then, I did the follow steps: vi /etc/selinux/config and change the value selinux=enforcing to disabled. Restart your Operating System. Type it getenforce on prompt to your terminal. Try create the disk again through the command oracleasm createdisk DISK1 /dev/sdb1 Follow the example after the reboot: brunors