SCSI Hard Drive Connecting Pins. In my experience with PC's beginning with 8086s, I've never had a computer to repair/update/build that used a SCSI drive. There are many in use but I doubt that you have one. The SCSI drive pictured is from a junker that someone gave to me. I included it just for your information.
SCSI drive uses a ribbon cable but with 50 pins instead of 40 pins. The power connector is the same as on non-SCSI. There are no jumper pins to select.
The power connector, data cable connector and jumpers are the same as your ATA hard drive. The only difference is the audio connectors, which connect by a small cable to a socket on your motherboard. If your computer doesn't have any audio cable, don't panic. Some modern computers send sound through your data cable. If you have to disconnect your CD/DVD drive, mark the data cable and replace the drive in the same position on the same data cable it came from.
Typical Floppy Drive
The Floppy Drive doesn't have any jumpers; also it's power and data connectors are different than on the hard drive and CD/DVD drives. You can't confuse the power connector and data cables because they fit only the floppy. All floppies don't have the power connector in the same position in relation to the data connector so you may have to experiment to find pin 1 on the data connector. It shouldn't harm anything if you get the data connector backwards; it just won't read/write. The power cable fits only one way so no problem.
Typical CD/DVD, Floppy and SCSI connectors.
Typical CD drive connectors. CD/DVD drives use the same kind of data and power connections as your hard drive.
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