If you attempt to install Oracle VM Server in UEFI mode on a virtual drive that is not GPT or only MBR, a partitioning error occurs in the Anaconda installation program.
Workaround: Do the following to work around this issue:
Select OK to return to the previous installer screen.
Enter Alt+F2 to open a shell prompt.
Use the parted command to change the label of the disk. Alternatively, use the dd command to clean up the disk.
Return to the installation program and then select Back to return to the previous installer screen.
Ensure that storage is discovered and then continue the installation.
Bug 22503847