by Ritchie » Fri Mar 26, 2004 12:09 pm
And I think a small percentage of additional space is also lost by the O/S in the creation of partitions, etc.
For example, I think it was with our old system that when I installed Windows 2000, 8MB of the disk space it reported was unavailable, even with a single partition. When I tried to manually create partitions, the maximum allowed partition size reported was that much less than the disk size reported, and it would not allow me to enter through a disk size equal to the reported disk size or between the disk size reported and maximum allowed partitin size reported. Even with Windows 2000 installed on this 6GB disk, 8MB would show up as unpartitioned space. And this is even with how I usually let Windows 2000/XP Setup create partitions itself after telling it to install on an unpartitioned, unformatted drive (Setup handles it all).
I think the most probable uses of this disk space is in the information used to store the partitions and File Allocation Tables, so that by the time you look at the number of MB available for actual files and folders, a bit of the space, reported by say, the BIOS, has already been used.