A MASTER OR A SLAVE DEVICE
IDE controllers may contain more than one port and hence contain more than one IDE cable. Such a controller is called an enhanced IDE controller. Its ports are called the primary port, secondary port, tertiary port, etc. Currently, most enhanced IDE controllers contain two ports: the primary port and the secondary port. Any “bonus” port that comes with a peripheral device, for example, your sound card, is taken as a secondary port.
Secondary Port
Red
Primary Port
Red
Figure A-2 Enhanced IDE Controller Card
Note: Your PC system can have only one port of each kind at any time. If you add an enhanced IDE controller to the system, you must remove or disable the PC’s original port(s). Similarly, if a “bonus” port is present, you must disable either this port or the PC’s secondary port, if your PC already has a secondary port.
Because each IDE port supports up to two devices, you need to tell your PC whether a device you are connecting is the master or the slave device of that port. As a result, if you have more than one IDE
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