Setup will prompt you to configure the hard disk using FDISK. Ensure is highlighted and press Enter . The VM will automatically reboot to initialize the changes.
: Do not allocate more resources than necessary. Allocating 64 MB of RAM is already generous. Giving DOS more memory will not make it faster. Similarly, a 500 MB hard disk is plenty for the OS, drivers, and several applications. ms dos 622 img files works with virtual box top