data storage devices [2]![click to hear](/images/speaker.jpg)
Electronic devices used to record or save data on a magnetic or optical medium.
hard disk drive ![click to hear](/images/speaker.jpg)
Device integrated into the computer that reads and writes data on the hard disk inside the case.
disk ![click to hear](/images/speaker.jpg)
Rigid magnetic medium that is mounted on a central axis; its surface is divided into tracks and sectors on which data are written.
disk motor ![click to hear](/images/speaker.jpg)
Device that converts the electric energy powering it into mechanical energy so that disks can rotate at several thousand revolutions per minute.
actuator arm motor ![click to hear](/images/speaker.jpg)
Device that converts the electric energy powering it into mechanical energy to move the actuator arm according to the computer’s instructions.
read/write head ![click to hear](/images/speaker.jpg)
Device used to extract stored data from a disk or to write new data on a disk.
actuator arm ![click to hear](/images/speaker.jpg)
Movable arm bearing the read/write head; it moves the head across the surface of the disk.