These PC cables have a notch or key on one side of plug and can only be inserted in one orientation in connector socket. If the notch is missing, you may also look for a small arrow mark on pin 1 of the cable plug. Other marking is that the ribbon or flat cable some times will have the first wire in a different color compared to rest of the cable.
- Ron Patton
The red line going down the cable indicates were pin one is connected. yes but the question is about on the hard drive and not the cable. the answer is Normally, pin 1 is closest to the power connector on the drive. BACE
A Molex Connector connects to optical drives and hard drives.
The SCSI cable.
There is a data cable,and a power cable that connect the drive to your PC. Everything is done with the data cable, there is no audio or video wires.
Floppy data cable is 34 pin flat cable having two connectors for floppy drive. The floppy drive connected at the end connector is A: and the another connector disk is B:..
Cable Select or by the jumpers put on the hard drive
A parallel ATA connector can use one data cable for two drives.
The second drive is mounted in any convenient spot above or below the first, and the flat ribbon cable going to the first drive usually has a second connector part way down the cable that can CAREFULLY plug into the second drive. It is sometimes labeled 'Slave', and only fits one way. Connect a spare power connector to the drive, and set the little jumper in the back of the drive to either CS (cable select) or Slave. These instructions are for older PATA drives that use a wide, flat, ribbon cable. For newer SATA drives, it mounts the same, and the power is the same, but there is a separate thin data cable that connects the second drive straight to the motherboard SATA connector. The computer should recognize the new drive once it's powered up, and will assign it an available drive letter.
There are jumpers on the drives that differentiate the master from the slave. If the jumpers aren't set correctly, the BIOS will not recognize them. In addition, some IDE ribbon cables are also labled Drive 0 (or Master) and Drive 1 (or Slave). If the jumpers are set correct, but the drives are plugged into the ribbon cable incorrectly, the computer will not recognize the drives.
a cable for connecting a floppy drive to the computer motherboard.
There are two cables that connect to the floppy drive in a desktop computer.There is a four pin power cableThere is a ribbon cable that has a part twisted end (the twisted end connects to the floppy drive).
Portable drives (flash drive/jump drive) can also serve as storage devices.
Data cables (called ata cables or serial or SCSI) simply transfer data from one device to the motherboard inside or even to another device hooked up to the same cable. An example would be a cdrom drive could transfer data for listening to music via the data cable and the motherboard would process it and produce sound via speakers.