disc
disc
optical
"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".
Optical disk
yes
DVDs or CDs
Optical disks are defined as "Write Once/Read Many" media. Some optical disk can be re-written. This is accomplished by burning the first layer smooth and writing the bit bubbles again. This can only happen a few times before the optical media is spent. Magnetic disks are defined as "Write Many/Read Many" media. This is what is needed for the continued operation of a computer over any extended duration.
David Gregg was the inventor of the optical disk.
Optical Disk
No. A disk drive can use one of several methods of storing data, including magnetic, Flash, and optical.
I think it is, because its an external memory.
Magnetic media like a hard disk drives are fairly fast so it is suitable for multimedia applications. Optical media like DVDs and CDs are much slower.