Tài liệu How To Build Your Own Computer phần 4

It is much easier to configure these drives before you actually install them in
the case. If you install them first, having enough room to actually set the
jumpers can be a problem.
Before doing this, you must decide what type of drives and how many you
want in your system. Then you will need to decide how to configure them to
make them all work together. Here is some data to help you out:
Your motherboard has two IDE channels, each supporting two devices. So, if
you want two hard drives, for example, you should have one be the “master”
and the other be the “slave”. Have your main hard drive (the one with your
operating system) be your “master” and the other one will be your slave. If
you will only have one hard drive, then you will have it configured as the
“master”, or on some drives, you would choose “single” or “cable select” to tell
the IDE bus that it is the only drive on that chain.