Raw Disk Mapping.

We did P2V all redhat 5.5 physical server to virtual.
Here is the situation we ran into.After we P2V’d the servers, and moved all of their data to virtual drives, when I went to remove the RDMs from one server as a test, it actually rearranged all of the drives within the operating system after a reboot and oracle services won't start. We were able recover from it but I would like some help in understanding what caused the issue and how we can move forward with the remaining servers while avoiding the same thing. Customer using Oracle ASM.

Thanks