Data storage device coupling/decoupling actuator arm to/from an actuator

1. A data storage device comprising:

a first disk surface;

a first actuator arm;

a first head connected to a distal end of the first actuator arm;

an actuator;

a first coupler configured to couple the first actuator arm to the actuator;

control circuitry configured to seek the first head over the first disk surface during a seek interval by at least:

actuating the first coupler in order to couple the first actuator arm to the actuator during at least part of the seek interval;

while the first actuator arm is coupled to the actuator, moving the actuator in order to seek the first head over the first disk surface; and

actuating the first coupler to decouple the first actuator arm from the actuator.

2. The data storage device as recited in claim 1 , wherein the actuator comprises a voice coil motor.

3. The data storage device as recited in claim 1 , wherein the first coupler comprises an electromagnetic coupler.

4. The data storage device as recited in claim 1 , wherein the first coupler comprises a piezoelectric coupler.

5. The data storage device as recited in claim 1 , wherein the first coupler comprises a thermo coupler.

6. The data storage device as recited in claim 1 , wherein after the seek interval the control circuitry is further configured to maintain the first head over a data track on the first disk surface while the first actuator arm remains coupled to the actuator.

7. The data storage device as recited in claim 1 , further comprising:

a second disk surface;

a second actuator arm;

a second head connected to a distal end of the second actuator arm; and

a second coupler configured to couple the second actuator arm to the actuator;

wherein the control circuitry is further configured to actuate the second coupler so that the second actuator arm is coupled to the actuator during at least part of the seek interval.

8. The data storage device as recited in claim 7 , wherein the control circuitry is further configured to:

actuate the second coupler in order to decouple the second actuator arm from the actuator; and

after the seek interval, maintain the first head over a data track on the first disk surface while the first actuator arm remains coupled to the actuator and while the second actuator arm is decoupled from the actuator.

9. The data storage device as recited in claim 7 , wherein the control circuitry is further configured to:

seek the first head over the first disk surface by at least accelerating the first head during an acceleration interval, maintaining the first head at a substantially constant velocity during a constant velocity interval, and decelerating the first head during a deceleration interval;

actuate the second coupler in order to couple the second actuator arm to the actuator prior to the acceleration interval; and

actuate the second coupler in order to decouple the second actuator from the actuator during at least part of the constant velocity interval.

10. The data storage device as recited in claim 1 , further comprising a first stopper configured to engage the first actuator arm when the first actuator arm is decoupled from the actuator, wherein a radial location of the first actuator arm relative to the first disk surface remains substantially fixed while the first stopper is engaged with the first actuator arm.

11. The data storage device as recited in claim 10 , further comprising a secondary actuator configured to actuate the head radially over the disk while the first stopper is engaged with the first actuator arm.

12. A data storage device comprising:

a first disk surface;

a first actuator arm;

a first head connected to a distal end of the first actuator arm;

a second disk surface;

a second actuator arm;

a second head connected to a distal end of second first actuator arm;

an actuator;

a first coupler configured to couple the first actuator arm to the actuator;

a second coupler configured to couple the second actuator arm to the actuator; and

control circuitry configured to:

actuate the first coupler in order to couple the first actuator arm to the actuator;

move the actuator in order to first seek the first head to a first data track on the first disk surface; and

during the first seek:

actuate the second coupler in order to couple the second actuator arm to the actuator; and

move the actuator in order to second seek the second head to a second data track on the second disk surface; and

after the first seek, actuating the first coupler to decouple the first actuator arm from the actuator.

13. The data storage device as recited in claim 12 , wherein during the first seek the control circuitry is further configured to actuate the second coupler in order to decouple the second actuator arm from the actuator.

14. The data storage device as recited in claim 13 , wherein during the first seek the control circuitry is further configured to:

read servo data recorded on at least one of the first or second disk surfaces; and

actuate the second coupler in response to the servo data in order to decouple the second actuator arm from the actuator to thereby servo the second head over the second disk surface.