I am using VirtualBox Version 4.3.20. Host operating system is Windows 7 Professional Service Pack 1, 64-bit.
I created a Virtual Machine for Linux Ubuntu 13.10. For the Virtual Hard Drive I set the size as 16 GB. In the Windows Explorer I can see that the size of VDI file is 16 GB. While installing Linux Ubuntu, I selected the option for creating manual partition. There I saw that the Virtual Hard Drive size is showing as 17.2 GB. This is what is being shown:
/dev/sda ATA VBOX HARDDISK (17.2 GB)
How come Linux is thinking that the virtual hard disk is 1.2 GB bigger than actual size?