The truth is that there is no real need to partition a single drive. I believe the real advantage, if this could be considered an advantage, is that one can minimize the amount of writing and reading from the physical drive and thus keep the heads of the drive closer to the information pertaining to task at hand. This could potentially elongate the life expectancy of the drive, as well. This would also minimize read and write access times with the physical moving parts. Right now, with a single partition I am unsure of how the information is physically written and read from the drive, as defragmenting supposedly "defragments" and makes data access faster. Then, the real catch is that once a program is loaded from the hard drive, the program will usually remain in memory and the hard drive will no longer be needed. Hence, you may never really notice that change from defragmentation and if it really worked (but they say it does).... {VOODOO}.