This chapter is all about drives—disk drives—which come in assorted sizes and shapes. The first disk drives were physically large, small in capacity (limited in the amount of data they could store), and very expensive. Today, disks drives are physically small, large in capacity, and very inexpensive.
The history of disk drives is long and complex. In this chapter, we begin our exploration by first looking briefly at the history and development of disk drives. We start with the most basic of drives (the floppy disk drive), and continue through the early hard disk drives, examining their complexities and limitations along the way.
Before starting this chapter, you should review the discussions of memory, hexadecimal notation, and BIOS operations in Chapters 6 and 7.