While following Oracle steps to install Oracle VM 3 within VirtualBox, there are steps to create 3 virtual disks and then mount them for pool, repository and template import with 12G, 64G and 32G respectively.
My final goal is to install Oracle EBS 12.1.3 template. It needs 250G for DB Tier and 50G for Apps Tier. I wonder if I need to adjust the size of the virtual disks and to what values? My laptop runs on Windows 7 and has only about 325G disk space left.