Magnetic Hard Disk Mechanism track t spindle arm assembly sector s cylinder c→ read-write head platter arm rotation Schematic diagram of magnetic disk drive Photo of magnetic disk drive Database System Concepts-7th Edition 12.6 @Silberschatz,Korth and SudarshanDatabase System Concepts - 7 12.6 ©Silberschatz, Korth and Sudarshan th Edition Magnetic Hard Disk Mechanism Schematic diagram of magnetic disk drive Photo of magnetic disk drive