A optical drive is essentially what you put CD's DVD's and install discs into.
A Molex Connector connects to optical drives and hard drives.
The cable connects between the motherboard of the computer and the hard-drive or optical drive.
"Disc" refers to optical media, such as CDs or DVDs. "Disk" refers to magnetic media, such as hard drives. So the answer depends on which drive you are referring to; most have both an "optical disc drive", and a "hard disk drive".
The hard drive, the optical drive and usually memory are the easiest components to replace. Of the three, the optical drive is probably the easiest... usually one screw.
Case / power supply, Motherboard, CPU, Memory, Optical drive, Hard drive...
sfasa
CPU Motherboard Ram Graphics controller Hard drive Optical Drive
Motherboard, hard drive, CPU, GPU, cooling fans, optical drives, floppy drive and powersupply.
A Optical drive is hardware that read and drive a DVD disk or programs.
Neither. Is Your hard drive input or output? Neither. It is simply a storage device as a flash drive or internal optical drive would be.
Motherboard, hard drive, CPU, GPU, cooling fans, optical drives, floppy drive and powersupply.
As data in binary format of 0 & 1 on hard drive sectors.