Internal

Procedure

Virtual Machine Library -> + (Add) -> New -> Create a custom virtual machine -> Linux -> CentOS 64-bit -> Create a new virtual disk.

The disk size is 20 GB but can be changed later.

Continue -> Customize Settings.

This will open a dialog that can be used to chose the name of the VM bundle and the location where it will be saved.

"Enable hypervisor application in this virtual machine" - OK

"Enable code profiling application in this virtual machine" - don't, causes a BIOS error.

How to choose a different disk name at creation?

This is where the size can be adjusted.

Bus type: SCSI

Split into multiple files.

Settings -> CD/DVD (IDE) -> Choose a disk or a disk image.

Startup disk: CD/DVD.