Spindle Motor
Actuator Assembly
Off Platter Parking
Internal Electronics
Printed Circuit Board
Platter
Controls the rotation of the platters at up to 15,000 RPM.
This is where the data is magnetically stored
The actuator "parks" on this landing ramp off the platters to avoid media contact during impact
All of the necessary components for an HDD have power and data lines to allow your drive to store data
Preamp and other logic controls the actuator assembly.
The mechanism that seeks across the platters and contains the read/write heads