keylock is locked, the PC will not boot. The keyboard lockout keylock was
intended to be a first-level of security for PCs in large offices and work areas.
The keys for a PC keylock are usually a round key, and many manufacturers
use the same key for all of their systems, so the security it provides is limited.
Anyone with a screwdriver can open the case and disable the lock and, for
some cases, they don’t even need the screwdriver.
Front-panel door lock If the front panel of your PC has one or more doors, it
may also have a door lock either on the door or on the front panel. When the doors
are closed and locked, curiosity seekers are prevented from accessing the drives
behind the doors. However, since the doors are made of plastic and can be easily
pried open, this feature should not be used as a means to secure the system.If your case has a keylock or a front-panel door lock, be sure that it also has keylock
keys. Typically, you will get two of each key. If you plan to use them, store one of the keys
in a safe place so that you will be able to unlock your PC after you lose the other one.Drive Bays
Since the PC AT, users have been able to decide the number and type of disk drives in their
computers. As long as the power supply and cooling system support them, you can add
floppy disk drives, hard disk drives, CD-ROM drives, tape drives, and more to your PC.
Generally, drives are installed in the drive bays provided on virtually all PC case de-
signs and form factors. Figure 15-8 shows a deskto pcom puter with its drive bays ex-
posed. This system, an ATX case from Enlight Corporation, provides three 5.25-inch
“half-height” drive bays, two 3.5-inch one-inch high drive bays, and two 3.5-inch drive
bays hidden inside the case.(^350) PC Hardware: A Beginner’s Guide
Figure 15-8. The drive bays of an ATX desktop chassis. Photo courtesy of Enlight Corporation
3.5" bay
5.25" bays