Our research shows that, overall, approximately 3.1% of PCs that have one physical hard drive also have an unutilized partition with drive letter D:. Our research indicates that 4.8% of portables and 2.4% of desktops have a D: drive partition that has 99% or more free space. It appears that it is common for some vendors to split the primary hard drive into two partitions. Often a drive is split into two equal partitions. If you think your hard drive capacity isn’t what you paid for, you might want to check to see if you have an unutilized drive partition.
Some PC vendors are making a practice of creating a small partition on a system’s primary hard drive in which to store the systems’ original restoration information. Generally these partitions are 5 – 12 Gigabytes in size and are preformatted during the manufacturing process. The practice appears to have replaced the inclusion of a restoration CD for some PC vendors. While it may be considered a convenience by some to have the operating system and driver backups loaded on the local hard drive, the practice should not be considered a safe backup practice for these system files.