How does a magnetic drum differ from a magnetic disk?

The correct answer is that the tracks on a magnetic drum are assigned to channels forming circular bands around the drum. This design feature is integral to how magnetic drums function. Unlike magnetic disks, which have a planar storage surface allowing for a more straightforward layout of tracks and sectors, magnetic drums utilize a cylindrical structure. Data is organized in concentric tracks that run around the surface of the drum; when the drum spins, the read/write head moves over these tracks to access data.

This method of forming circular bands enhances the speed of data access, as the rotating drum can move past the read/write head rapidly, allowing for quick retrieval of information. The physical characteristics of the drum also mean it operates differently than disks in terms of data access and storage capabilities.

While other options may describe various aspects of magnetic storage, they do not accurately depict the unique structural and operational differences that define how magnetic drums function compared to magnetic disks.