Which of the following identifies a sector on a disk?

The identification of a sector on a disk is best represented by ID information. Each sector on a disk contains metadata, which includes identifiers such as the sector number, track number, and cylinder number. This ID information is crucial for the operating system to access the data stored within that specific sector.

In the context of disk operations, ID information serves as a way for the system to locate and retrieve data efficiently, ensuring that read and write operations are accurately directed to the appropriate physical locations on the disk.

Other choices do not pertain directly to identifying a sector. Data integrity refers to maintaining and assuring the accuracy and consistency of data over its lifecycle. Access time refers to the speed at which data can be read from or written to the disk, which is a performance metric rather than an identification feature. Chunk size often pertains to how data is divided during processing or storage but does not denote individual sectors on a disk.