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原文如下:

Hard Drive and Partitioning Basics
What is a partition?
A partition is a basic container for data on your hard drive. Although most hard drives have only one partition, System Commander 2000 allows you to divide up a hard drive into several distinct partitions. Each partition occupies a physically separate area of the hard drive and functions almost as if it were an independent hard drive. Because of this, a partition can be given its own name, or label, can contain its own operating system and file system, or can simply operate as an additional area for better organization of your files. In Windows and Dos, partition are usually assigned drive letters such as C:, D:, E:, etc.
Types of Partitions -Partition Terminology
Primary partitions
A hard drive can be divided up into a maximum of four primary partitions. The first partition on a hard drive is numbered Partition 0; subsequent primary partitions are Partition 1, 2, and 3.
Extended and Logical Partitions
In order to provide more than four partitions, a primary partition can be designated as an extended partition. An extended partition can be subdivided into several more sections known as logical partitions.
Bootable Partitions
Some partitions can be made bootable, which means that an operating system can be started up from within that partition. A bootable partition is also known as an active partition. A non-bootable partition cannot initialize an operating system. The ability for a partition to be bootable is controlled by the operating system. For example, DOS, Windows 95, and Windows 98 allow only primary partitions to be bootable and will not allow a logical partition to be bootable. By contrast, other operating systems including OS/2 and Linux can be installed to allow a logical partition to bootable. In order to start up, every PC must contain at least one bootable partition. Using Windows 95/98 or DOS, this partition is normally the first active primary partition (Partition 0) of the first hard drive in the computer (Drive 0), and is by default assigned the drive letter C:. To run more than one operating system on your PC ，you will typically want to configure a separate bootable partition for each OS. Partitioning and booting characteristics of several operating systems are discussed more fully in Appendix C: Additional considerations.


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