Apple Macintosh LC - Manual (Page 33)

(high-density) disks.
800K and 1.4 MB floppy disks are physically the same size, and the
differences between them are subtle. The following figure shows how you can
tell them apart.
Look at the floppy disks that came with your computer. By comparing them with
the illustration, you should be able to tell what their capacities are.
Just as there are different types of floppy disks, there are also different
types of floppy disk drives. Your Macintosh comes with an internal 1.4
megabyte disk drive.
Inserting a Disk into a Disk Drive
It's important to know which type of disk you're working with before you
insert a disk into a disk drive, because not all types can be used in all
floppy disk drives.
As the chart below shows, a floppy disk drive can take disks of the
corresponding capacity, plus any smaller-capacity disks. That is, a 1.4 MB
disk drive can take both 1.4 MB and 800K disks.
But larger-capacity disks can't be used in smaller-capacity drives. You can't
use a 1.4 MB disk in an 800K drive. Your internal floppy disk drive is a 1.4
MB drive.
The procedure for inserting a floppy disk into a disk drive is the same no
matter what kind of disk or drive you are using.
1. If your computer isn't on right now, start it up.
- If you do not have a hard disk you can use as a startup disk, insert the
System Startup disk into a disk drive.
- Press the top of the on/off switch on the back of the computer to turn the
computer on.
2. If you have no empty disk drives (internal or external), eject the System
Startup disk.
If you have an empty disk drive, go on to the next step.
To eject the System Startup disk, follow these steps:
- Click the System Startup disk icon to select it.
- Choose Eject from the File menu.
3. Find a floppy disk you can use for this exercise.
You can use either
- a brand new floppy disk
- an old floppy disk whose contents you don't need
Just make sure that you do not put a 1.4 MB disk into an 800K disk drive.