Temperature monitoring systems and methods

• US 9,753,442 B2
• Filed: 08/22/2013
• Issued: 09/05/2017
• Est. Priority Date: 07/15/2010
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Lim, Kang Hai, Lee, Lucas Kong Yaw, Vitale, Scott Vincent, Ng, Choon Wei, Gu, Jun
• Primary Examiner(s): Kasenge, Charles
• Application Number:
  US13/973,525
• Publication Number:
  US 20140005854A1
• Time in Patent Office: 1,475 Days
• Field of Search: 700300
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G06F 1/206 comprising thermal management
• CPC Class Codes: G11B 19/046 Detection or prevention or problems due to temperature
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

This disclosure is related to systems and methods for temperature monitoring of electronics, such as a controller or processor within a data storage device. In one example, a controller may be configured to determine an operation to perform and determine a temperature of electronics associated with executing the operation. The controller may then delay execution of the operation when the temperature is greater than a threshold.

Claims

1. A data storage device comprising:

a controller coupled to an interface and to a rotatable data storage medium, the controller configured to;

determine an operation to perform based on an instruction received via the interface from a host computer system;

if the operation is a data access operation, determine whether the operation meets a condition for a continuous data access operation, wherein the condition for the continuous data access operation is that the data access operation spans multiple data tracks on the rotatable data storage medium;

determine a temperature of electronics within the data storage device associated with executing the operation; and

delay execution of the operation when both the temperature is greater than a threshold and when the operation meets the condition for the continuous data access operation.

2. The data storage device of claim 1 further comprising a temperature sensor proximate to the electronics and configured to determine the temperature.

3. The data storage device of claim 2 wherein the delay is implemented via software within the controller and wherein the delay comprises a redundant cycle introduced into firmware of the controller.

4. The data storage device of claim 1 wherein the threshold is adjustable and the threshold is lowered in response to an in-service time increase of the data storage device.

5. The data storage device of claim 1 wherein the threshold is set based on a sampling of temperature measurements during a period of inactivity of the data storage device.

6. The data storage device of claim 1 wherein the electronics comprise a microprocessor, and wherein the controller is configured to reduce power to the microprocessor during the delay.

7. The data storage device of claim 6 further comprising the controller further configured to:

determine a location of the rotatable data storage medium for data associated with the instruction;

perform a first portion of the operation on the location;

determine a temperature of electronics associated with performing a second portion of the operation on another location of the rotatable data storage medium that is associated with the instruction;

compare the temperature of the electronics associated with performing the second portion of the operation to the threshold;

delay the second portion of the operation associated with the another location when the temperature of the electronics associated with performing the second portion of the operation is greater than the threshold; and

perform the second portion of the operation on the another location when the delay is completed.

8. The data storage device of claim 7 wherein the operation comprises reading or writing data.

9. The data storage device of claim 7 wherein the rotatable data storage medium comprises a magnetic disc data storage medium and wherein the location comprises a track on the rotatable data storage medium and the another location comprises a second track on the rotatable data storage medium.

10. The data storage device of claim 9 wherein the delay comprises a predetermined number of rotations of the rotatable data storage medium, wherein the predetermined number of rotations comprises at least one rotation.

11. The data storage device of claim 10 further comprising a head element coupled to the controller to allow reading and writing of data to the rotatable data storage medium and reducing power to the head element during the delay.

12. The data storage device of claim 11 further comprising a heater proximate to the head element and reducing power to the heater during the delay.

13. A method comprising:

determining, via a controller, a data storage operation to perform based on an instruction received from an interface;

if the operation is a data access operation, determining, via the controller, whether the operation meets a condition for a continuous data access operation; and

determining, via the controller, a temperature of electronics within a data storage device associated with executing the data storage operation; and

delaying, via the controller, execution of the data storage operation when both the temperature is greater than a threshold and when the operation meets the condition for the continuous data access operation,

wherein the condition for determining that the operation is the continuous data access operation is that the data access operation spans multiple tracks on a rotatable data storage medium of the data storage device.

14. The method of claim 13 wherein the delaying comprises a delay of at least one rotation of the rotatable data storage medium.

15. A data storage device comprising:

a controller coupled to an interface and to a data storage medium, the controller configured to;

determine an operation to perform based on an instruction received via the interface from a host computer system;

if the operation is a data access operation, determine whether the operation meets a condition for a continuous data access operation;

determine a temperature of electronics within the data storage device associated with executing the operation; and

delay execution of the operation when both the temperature is greater than a threshold and when the operation meets the condition for the continuous data access operation,

wherein;

the threshold is adjustable and the threshold is lowered in response to an in-service time increase of the data storage device;

or

the threshold is set based on a sampling of temperature measurements during a period of inactivity of the data storage device.

16. The data storage device of claim 15 and wherein the operation comprises reading or writing data.

17. The data storage device of claim 15 and wherein the data storage medium comprises a rotatable data storage medium.

18. The data storage device of claim 17 and wherein the delay comprises a predetermined number of rotations of the rotatable data storage medium.

19. The data storage device of claim 17 and further comprising a head element coupled to the controller to allow reading and writing of data to the rotatable data storage medium and reducing power to the head element during the delay.

20. The data storage device of claim 19 and further comprising a heater proximate to the head element and reducing power to the heater during the delay.