Specifications

Making Back up Copies
It is important to make copies of all your data and system
diskettes. Copy all diskettes that contain programs, such as the
original MS-DOS diskettes that come with your computer, and
use only the copies. Store your original MS-DOS diskettes in a
safe place away from your working copies. Backup your data
diskettes regularly, whenever you revise them, to keep them
up-todate, and store them away from your originals.
Chapter 1 describes how to use DISKCOPY to copy your
MS-DOS diskette. For more detailed information to make
backups of other diskettes, refer to Chapter 4 “Using MS-DOS
with your computer”.
It is best to put most of the programs and data files you use
regularly on the hard disk. Keep backup copies of all your
program files on diskettes, however, and regularly copy
important data files to diskettes as well.
Using a Single Diskette Drive
The operating system expects the computer to have at least
two diskette drives, and it displays prompts and messages
accordingly. If the computer has only one diskette drive, MS-DOS
treats the one drive like two logical drives. This helps you
perform operations that normally require two diskette drives.
Usually, MS-DOS
recognizes the first diskette drive (the top
drive) as drive A and the second diskette drive as drive B.
If you have only one diskette drive, MS-DOS recognizes it as
both A and B.
For example, if you give a command to copy from A to B,
MS-DOS copies data from the diskette you place in the single
Using Your Computer
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