Before a disk drive can access any sector record, a computer program has to provide the record’s disk address. What information does this address specify?

The correct answer is: D. All of the above

A disk address specifies the track number, sector number, and surface number of the sector record that the disk drive should access.

• Track number is the number of the concentric circle on the disk surface where the sector record is located.
• Sector number is the number of the sector on the track where the sector record is located.
• Surface number is the number of the disk surface where the sector record is located.

The disk address is used by the disk drive to locate the sector record on the disk. The disk drive reads the sector record from the disk and then transfers it to the computer’s memory. The computer can then access the data in the sector record.