Drive temperature self-adjustment for temperature-sensitive measurements

• US 7,136,247 B2
• Filed: 09/30/2003
• Issued: 11/14/2006
• Est. Priority Date: 09/30/2003
• Status: Expired due to Fees

• Current Assignee: Hitachi Global Storage Technologies Netherlands BV (Western Digital Corporation)
• Original Assignee: Hitachi Global Storage Technologies Netherlands BV (Western Digital Corporation)
• Inventors: Escobar, Jorge F., Khurshudov, Andrei
• Primary Examiner(s): Sniezek, Andrew L.
• Application Number:
  US10/675,306
• Publication Number:
  US 20050068025A1
• Time in Patent Office: 1,141 Days
• Field of Search: None
• US Class Current: 360/69
• CPC Class Codes: G11B 2005/001 Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 25/043 using rotating discs
• CPC Class Codes: G11B 27/36 Monitoring, i.e. supervising the progress of recording or reproducing for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06
• CPC Class Codes: G11B 33/144 by detection, control, regulation of the temperature
• CPC Class Codes: G11B 5/012 Recording on, or reproducing or erasing from, magnetic disks G11B17/00, G11B19/00 take precedence

Abstract

A method and program product supporting adjusting a temperature of a hard disk drive (HDD) during testing. An HDD test program is performed within a pre-determined optimal test temperature range. The HDD is kept within this pre-determined test temperature range by switching HDD operation modes back and forth between a higher heat generating Rapid Seek Mode and a lower heat generating IDLE mode. The HDD is thus kept within the optimal test temperature range without the use of external heating and/or cooling devices.

Claims

1. A method for controlling temperature in a hard disk drive during testing, the hard disk drive having at least two modes of operation, the method comprising:

setting a desired temperature range for a hard disk drive that is being tested, wherein the hard disk drive is tested by monitoring at least one Performance Measurement Unit (PMU), and wherein each PMU is a quantified measurement unit that describes any deviation from an optimal performance of the hard disk drive;

upon determining that a temperature inside the hard disk drive is below the desired temperature range, changing a mode of operation of the hard disk drive from a first mode of operation to a second mode of operation, wherein the first mode of operation generates less heat than the second mode of operation, wherein an amount of time required to reach the desired temperature range is minimized by keeping the hard disk drive in the second mode of operation until the desired temperature range inside the hard disk drive is reached, wherein the minimized amount of time required to reach the desired temperature range results in a reduced number of PMUs being performed while the hard disk drive reaches the desired temperature range;

upon determining that the temperature, inside the hard disk drive is above the desired temperature range, changing the mode of operation of the hard disk drive from the second mode of operation to the first mode of operation, wherein the desired temperature range inside the hard disk drive is maintained after being reached through use of the second mode of operation; and

suspending a test program for the hard disk drive as long as the temperature inside the hard disk drive is below or above the desired temperature range.

2. The method of claim 1, wherein the first and second modes of operation are seek modes, and wherein the first seek mode that is slower than the second seek mode.

3. The method of claim 1, wherein the first mode of operation is an IDLE seek mode and the second mode of operation is a rapid seek mode.

4. A method of claim 1, wherein the first mode of operation has a slower disk rotation speed than the second mode of operation.

5. The method of claim 1, wherein the first mode of operation has a slower clock speed than second mode of operation for a processor within the hard disk drive.

6. A method for maintaining a steady-state internal temperature inside a housing for a hard disk drive during testing operations of the hard disk drive, the hard disk drive having at least two modes of operation, the method comprising:

setting a desired temperature range for a hard disk drive that is being tested, wherein the hard disk drive is tested by monitoring at least one Performance Measurement Unit (PMU), and wherein each PMU is a quantified measurement unit that describes any deviation from an optimal performance of the hard disk drive;

upon determining that a temperature inside the hard disk drive is below the desired temperature range, changing a mode of operation of the hard disk drive from a first mode of operation to a second mode of operation, wherein the first mode of operation generates less heat than the second mode of operation;

upon determining that the temperature inside the hard disk drive is above the desired temperature range, changing the mode of operation of the hard disk drive from the second mode of operation to the first mode of operation and

suspending a test program for the hard disk drive as long as the temperature inside the hard disk drive is below or above the desired temperature range.

7. The method of claim 6, wherein the first and second modes of operation are seek modes, and wherein the first seek mode is slower than the second seek mode.

8. The method of claim 6, wherein the first mode of operation is an IDLE seek mode and the second mode of operation is a rapid seek mode.

9. A method of claim 6, wherein the first mode of operation has a slower disk rotation speed than the second mode of operation.

10. The method of claim 6, wherein the first mode of operation has a slower clock speed than a second mode of operation for a processor within the hard disk drive.

11. A computer readable medium, encoded with a data structure for controlling temperature in a hard disk drive during testing, the computer readable medium comprising:

program code for setting a desired temperature range for a hard disk drive that is being tested, wherein the hard disk drive is tested by monitoring at least one Performance Measurement Unit (PMU), and wherein each PMU is a quantified measurement unit that describes any deviation from an optimal performance of the hard disk drive;

program code for, upon determining that a temperature inside the hard disk drive is below the desired temperature range, changing a mode of operation of the hard disk drive from a first mode of operation to a second mode of operation, wherein the first mode of operation generates less heat than the second mode of operation, wherein an amount of time required to reach the desired temperature range is minimized by keeping the hard disk drive in the second mode of operation until the desired temperature range inside the hard disk drive is reached, wherein the minimized amount of time required to reach the desired temperature range results in a reduced number of PMUs being performed while the hard disk drive reaches the desired temperature range;

program code for, upon determining that the temperature, inside the hard disk drive is above to desired temperature range, changing the mode of operation of the hard disk drive from the second mode of operation to the first mode of operation, wherein the desired temperature range inside the hard disk drive is maintained after being reached through use of the second mode of operation; and

program code for suspending a test program for the hard disk drive as long as the temperature inside the hard disk drive is below or above the desired temperature range.

12. The computer readable medium of claim 11, wherein the first and second modes of operation are seek modes, and wherein the first seek mode that is slower than the second seek mode.

13. The computer readable medium of claim 11, wherein the first mode of operation is an IDLE seek mode and the second mode of operation is a rapid seek mode.

14. A computer readable medium of claim 11, wherein the first mode of operation has a slower disk rotation speed than the second mode of operation.

15. The computer readable medium of claim 11, wherein the first mode of operation has a slower clock speed than a second mode of operation for a processor within the hard disk drive.