Multi-spindle and multi-actuator data storage devices
A hard disk drive includes an enclosure housing a first set of magnetic recording media coupled to a first spindle motor, a second set of magnetic recording media coupled to a second spindle motor, and a third set of magnetic recording media coupled to a third spindle motor. The first set of magnetic recording media at least partially overlaps with the second set of magnetic recording media and the third set of magnetic recording media.
1. A hard disk drive comprising:
an enclosure including a first set of magnetic recording media coupled to a first spindle motor, a second set of magnetic recording media coupled to a second spindle motor, and a third set of magnetic recording media coupled to a third spindle motor, wherein the first set of magnetic recording media at least partially overlaps with the second set of magnetic recording media and the third set of magnetic recording media, wherein the first set of magnetic recording media, the second set of magnetic recording media, and the third set of magnetic recording media have outer diameters of 63-67 mm.
2. The hard disk drive of claim 1 , wherein the second set of magnetic recording media and the third set of magnetic recording media include more disks than the first set of magnetic recording media.
3. The hard disk drive of claim 2 , wherein the second set of magnetic recording media and the third set of magnetic recording media include nine disks and the first set of magnetic recording media includes eight disks.
4. The hard disk drive of claim 1 , wherein the first set of magnetic recording media, the second set of magnetic recording media, and the third set of magnetic recording media include the same number of disks.
5. The hard disk drive of claim 4 , wherein the first set of magnetic recording media includes nine disks.
6. The hard disk drive of claim 1 , wherein the second set of magnetic recording media and the third set of magnetic recording media rotate in an opposite direction of the first set of magnetic recording media.
7. The hard disk drive of claim 1 , wherein a total useable data storage area of the first set of magnetic recording media, the second set of magnetic recording media, and the third set of magnetic recording media is 198-250 in 2 .
8. The hard disk drive of claim 1 , wherein adjacent disk surfaces of the first set of magnetic recording media are spaced at 3.5-4 mm from each other.
9. The hard disk drive of claim 8 , wherein each disk of the first set of magnetic recording media, the second set of magnetic recording media, and the third set of magnetic recording media has a thickness at or substantially near 0.5 mm.
10. The hard disk drive of claim 1 , further comprising a controller, wherein the controller is configured to control the first spindle motor, the second spindle motor, and the third spindle motor at a first mode, the first mode including rotating only one spindle motor at a given point in time.
11. The hard disk drive of claim 1 , further comprising a controller, wherein the controller is configured to control the first spindle motor, the second spindle motor, and the third spindle motor at a first mode, the first mode including rotating only two spindle motors at a given point in time.
12. The hard disk drive of claim 1 , further comprising a controller, wherein the controller is configured to control the first spindle motor to rotate at a first rotational direction and to control the second spindle motor and the third spindle motor to rotate at a second rotational direction opposite the first rotational direction.
13. The hard disk drive of claim 1 , further comprising:
a first actuator arranged to position a first set of read/write heads over the first set of magnetic recording media;
a second actuator arranged to position a second set of read/write heads over the second set of magnetic recording media; and
a third actuator arranged to position a third set of read/write heads over the third set of magnetic recording media.
14. The hard disk drive of claim 13 , wherein the first actuator, the second actuator, and the third actuator are independently controlled by a controller.
15. The hard disk drive of claim 1 , wherein the second set of magnetic recording media and the third set of magnetic recording media do not overlap with each other.
16. A hard disk drive comprising:
means for providing a total useable data storage area of 198-250 in 2 ; and
means for accessing the total useable data storage area.
17. The hard disk drive of claim 16 , further comprising:
means for rotating the total useable data storage area.
18. A method comprising:
rotating a first set of magnetic recording media coupled to a first spindle motor;
rotating a second set of magnetic recording media coupled to a second spindle motor; and
rotating a third set of magnetic recording media coupled to a third spindle motor,
wherein an envelope of the first set of magnetic recording media at least partially overlaps with envelopes of the second set of magnetic recording media and the third set of magnetic recording media, wherein envelopes of the second set of magnetic recording media and the third set of magnetic recording media do not overlap, wherein the first set of magnetic recording media, the second set of magnetic recording media, and the third set of magnetic recording media have outer diameters of 69-71 mm.
19. The method of claim 18 , wherein the first set of magnetic recording media includes nine disks.