Next install the hard drive and optical drives.How a drive is physically installed will depend on the case.
When using an IDE cable, plug the two connectors that are closer together into the 2 drives, and the third to the controller or motherboard. The connector furthest from the board should be attached to the drive set as Master. Make sure the drive that you will install your OS on is the primary master. This is
the master drive on the Primary IDE bus which is usually the IDE 40 pin port on the motherboard labeled Primary or IDE 1..
Note: IDE connectors are keyed, so it should be impossible to insert them backwards. However, it doesn’t require very much force to do this and it can destroy your motherboard . Look carefully at the drive and the cable connection before you try to connect them. You should see a “missing” pin on the drive,and a corresponding blocked socket on the connector. If you break a pin on the
drive, you will probably have a worthless drive.
Note: most parallel IDE cables have a colored stripe down one side. That coloured stripe signifies “pin 1”—and usually will line up next to the molex power connection on your drive. Use this rule of thumb if your connectors aren’t keyed.Next, plug a 4 pin molex power connector into each hard drive and optical drive. If you are installing the power connector to a SATA drive, some drives
have the option of using either the SATA power connector (a flat about 1'' wide connector) or the standard molex connector; use one or the other, not both.Connecting both can break your hard drive. For better data transfer, you can purchase heat-protected high-end data cables at your nearest electronics store. If you install a floppy disk drive,the cable is very similar to the IDE cable, but with fewer wires, and a strange little twist in the middle.Floppy drives do not have master/slave configurations. The floppy disk connector is not usually keyed,making it all too easy to plug it in the wrong way! One wire in the IDE cable will be colored differently:this is pin 1. There is usually some indication on the floppy drive as to which side this is. The power plug for a floppy is 4 pins in a line, but rather smaller than the standard hard drive power connector.Plug the end of the cable with the twist into the floppy drive (''drive A:''). Plug the other end of the floppy ribbon cable into the motherboard. If you install a second floppy drives, plug the middle connector into “drive B:”. The twist between drive A: (on the end) and drive B (in the middle) helps the computer distinguish
between them.1