A parallel ATA connector can use one data cable for two drives.
Parallel ata cable connecter have 40 pins.
Usually a Centronics connector is used.
in RJ45 connector connected cat5 cable through same cable coding, that's call parallel cable.
A Molex Connector connects to optical drives and hard drives.
SAS is SCSI, it connects via a serial cable/connector instead of parallel (long and skinny) connector.
PATA stand for Parallel ATA. You would use an IDE cable for data transfer and a standard power connector IDE power cable. If you're looking for an external kit to read hard drives, look on Newegg.com or TigerDirect.com for a IDE to USB kit.
The 80-conductor cable and the 40-conductor cable.
The power connectors used by both 5.25-inch and 3.5-inch floppy drives are 4-pin connectors. The larger connector--used by 5.25-inch drives--is called a Molex or peripheral cable. This type of cable is also used by IDE/ATA hard drives and optical drives. The smaller 4-pin cable used by 3.5-inch floppy drives is generally called a floppy power cable.
One end is the Centronics connector and the other end is 25 Pin D type connector.
I tried to use the cable with an HP 2100 printer with parallel connector. It woulld not work with either Window XP or Windows 7.