In
I can't speak for why you've never seen that behavior, but it's
been my experience that it happens if you elect to create a
single partition which uses all available hard drive space.
This happens when installing Home or Professional, OEM or
Retail.
From this web site, take note of figures 6 through 8.
Clean Install Procedure with Illustrative Screen Captures
http://www.theeldergeek.com/xp_home_install_-_graphic.htm
If you're installing to a clean hard drive, you should see a
screen similar to this right after you accept the EULA. Note;
If any existing partitions are displayed on this screen, hit
the D key. You have to start with an unpartitioned drive.
Figure 6
http://www.theeldergeek.com/images/XP Home Setup Graphic/FF.gif
Note the disk size is 4095 MB.
If you press the C key to create a partition, you'll arrive at
a screen similar to this. Keep in mind that if you press Enter
here to begin the installation you'll go right to the screen to
select how you want to format the drive, Figure 9. You'll miss
the following screens.
Figure 7
http://www.theeldergeek.com/images/XP Home Setup Graphic/GG.gif
Notice the maximum size of the partition you can create is 4087
MB, 8 MB less than the size displayed earlier. If you were to
enter a number larger than the maximum allowed it will be
rejected. The amount will be reset to the maximum.
When you hit Enter, you're taken to this screen.
Figure 8
http://www.theeldergeek.com/images/XP Home Setup Graphic/HH.gif
Note the second entry, Unpartitioned Space equal to 8 MB.
Note: If you elect to use less than the maximum amount when you
create your partition during installation, the rest of the hard
drive will be available in Disk Management as unallocated
space. Should you create a second partition in Disk Management,
the entire unallocated space will be available. You won't have
the 8 MB set aside.
Here are a couple of MS articles with additional information.
Applies to XP as well as W2K
Setup Reserves Disk Space for Upgrading to Dynamic Disk
http://support.microsoft.com/kb/225822
How To Convert to Basic and Dynamic Disks in Windows XP
Professional
http://support.microsoft.com/kb/309044
Note this comment under General Notes.
"You must have at least 1 megabyte (MB) of free space on any
master boot record (MBR) disk that you want to convert. This
space is automatically reserved when the partition or volume is
created in Microsoft Windows 2000 or Windows XP Professional."
Good luck
Nepatsfan