If you have connected more than two hard drives (non-RAID), W7 created a special partition for the system stability. You can trick the system, and disconnect all hard drives except the system one. After you are done installing the system, you can connect the other drives again and not having the 200 mb partition.
All hard drives must have at least one partition to be usable by an operating system, even if the partition uses the entire drive. If you are installing an operating dissimilar from the one you are using currently (ie. Windows XP and FreeBSD), you should partition the disk from that system's installer, not in Windows.
The system partition is the active partition of the hard drive and it contains the OS boot record. The boot partition is the partition where the Windows operating system is stored.
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If you are installing windows XP with Windows 9x or me than the I would recommend you to use FAT32 as if you use NTFS than you wont be able to access Windows XP with NTFS partition. If you are installing Windows XP with Windows NT or Windows 2000 than you can use any partition type. But I would recommend to use NTFS.
Must be at least a 2 GB partition. System partition.
The boot partition
It is not possible to install any Operating System next to another on the same partition. To dual-boot Windows 7 and Windows XP, first install Windows 7, and while in the partition manager, delete all partitions and create one for Windows 7 and one for Windows XP. Then install Windows 7 to it's partition. Then install XP to it's partition. You should now be able to boot either Operating System. Note: You must install XP after Windows 7 as the Windows 7 installation wizard would want to upgrade XP. WARNING: This will erase all of the data on your hard drive. Be sure to back up all of your files before installing anything.
root partition
boot partitionThe boot partition is the disk partition that contains the Windows operating system files and its support files, but not any files responsible for booting.
Always should the drive be partitioned. As NTFS for Windows 7. You can edit partitions while installing Windows through the installation menu or command prompt, or in diskmanager after the operating system is installed.
boot partition
when installing your operating system you will create them, BE CAREFUL with out a program like partition magic, once you partition a Hard drive it is permanent.