Sunday, November 25, 2007

Components: HDD ribbon cables

You are installing a new hard drive, and you set the jumpers according to the instructions.
When you are ready to install the ribbon cable, what must be done to connect it to the hard drive?
1. The ISA connector on the disk controller card must be aligned properly in EISA-type motherboard connectors.
2. The power connector must be aligned with the red wire on the power cable.
3. The jumper settings on the drive must be set to select whether a straight data cable or a cable with a twist is used.
4. >>The data connector must be aligned with the red stripe on the data cable to match pin 1 on the hard drive.

Explanation : A hard disk drive is connected to a computer system with two cables, one for power and one for data. The power cable is connected through a Molex connector, which can only be plugged in one way.

For data, the ribbon cable uses a connector, which may or may not be keyed. It is important to make sure that pin 1 on the drive controller is connected to pin 1 on the drive. A colored wire or stripe on one side usually designates pin 1 on the ribbon cable. Pin 1 on the connector is usually designated by a "1" next to pin 1, an arrow pointing to pin 1, or a square solder pin on the back of the connector header.
Objective: Personal Computer Components