I’m installing RAC (using ASM) on Red Hat Linux 6.2. Oracle has decided not to provide asmlib for Red Hat 6 and above. So I needed to figure out how to ensure correct permissions and ownership for the shared disks. Red Hat has an article on the support website which recommends using udev or multipath. I set up multipath on my VMware systems but it did not see any disks. VMware was not reporting the UUID’s of the disks to Linux. A little research on the VMware website gave me a clue, and I inserted this line into the vmx files:
disk.EnableUUID = “TRUE”
After rebooting, the multipath software could see the shared disks and automatically created the multipath devices.