What is the difference between CD or DVD jukeboxes/changers and towers?
A. In a jukebox/changer, there are more slots and disks than there are drives. Robotic mechanisms automatically place the correct disk into one of the drives when the disk is needed. In a tower, many CD or DVD drives are stacked together in a single unit, and every disk is always sitting in a drive. Towers provide faster data access but typically cost more per disk and do not hold as many disks. Jukeboxes/changers cost less per disk and can hold up to 500 disks, but are slower because swapping disks in and out of the drives is time-consuming.