Method of optimizing design parameters of data storage system and method of applying optimized design parameters

1. A method of optimizing design parameters used to operate a data storage system, the method comprising:

determining and storing first design parameters to optimize the data storage system to operate while experiencing a general burn-in test condition;

generating a progressive failure condition pre-estimated to occur in the data storage system;

setting and storing third design parameters to optimize the data storage system to operate while experiencing the generated pre-estimated progressive failure condition;

and storing averages of the first and third design parameters as second design parameters.

2. The method of claim 1 , wherein the third design parameters comprise a predetermined regular variation characteristic with respect to the progressive failure condition.

3. The method of claim 2 , wherein the third design parameters comprise variable values related to the setting of read current and filter coefficients.

4. The method of claim 1 , wherein the general burn-in test condition comprises a condition during which the data storage system is operated in a heated environment outside of design operating conditions sufficient to impart a thermal stress on a recording medium used by the data storage system.

5. A method of optimizing design parameters used to operate a data storage system, the method comprising:

determining and storing first design parameters to optimize the data storage system to operate while experiencing a general burn-in test condition;

generating a progressive failure condition pre-estimated to occur in the data storage system; and

setting and storing third design parameters to optimize the data storage system to operate while experiencing the generated pre-estimated progressive failure condition,

wherein the pre-estimated progressive failure condition comprises a condition in which the data storage system performs off-track writing on a track of a recording medium adjacent to a target track until failure occurs.

6. A method of applying optimized design parameters for use by a data storage system when processing a signal, the method comprising:

applying first design parameters to be used by the data storage system to process a signal, the first design parameters being parameters that optimize the data storage system to operate while experiencing a general burn-in test condition; and

applying third design parameters to be used by the data storage system to re-process the signal if errors occur in the data storage system using the first design parameters, the third design parameters being parameters that optimize the data storage system to operate while experiencing a progressive failure condition,

wherein the progressive failure condition comprises a condition in which the data storage system performs off-track writing on a track of a recording medium adjacent to a target track until failure occurs.

7. The method of claim 6 , further comprising generating data to indicate that the errors occur if the errors occur in the operation of the data storage system using the third design parameters.

8. A method of applying optimized design parameters used in the operation of a data storage system when processing a signal in the data storage system, the method comprising:

applying first design parameters to be used by the data storage system to process a signal, the first design parameters being parameters that optimize the data storage system to operate while experiencing a general burn-in test condition;

applying second design parameters, which are set to averages of third design parameters and the first design parameters, to be used by the data storage system to re-process the signal if errors occur in the data storage system using the first design parameters, the third design parameters being parameters that optimize the data storage system to operate while experiencing a progressive failure condition; and

applying the third design parameters to be used by the data storage system to again re-process the signal if errors occur in the data storage system using the second design parameters.

9. The method of claim 8 , wherein the failure progressive condition comprises a condition in which the data storage system performs off-track writing on a track adjacent to a target track until failure occurs.

10. The method of claim 8 , further comprising generating data to indicate that the errors occur if the errors occur in the data storage system to which the third design parameters have been applied.

11. A method of optimizing design parameters of a data storage system, the method comprising:

determining first design parameters that optimize the data storage system to operate while experiencing an initial condition;

determining third design parameters that optimize the data storage system to operate while experiencing a predetermined progressive failure condition; and

storing the first and third design parameters for use by the data storage system,

wherein the predetermined progressive failure condition simulates conditions occurring after a predetermined number of uses of the data storage system, and

wherein, at the predetermined number of uses, the data storage system using the third design parameters experiences fewer errors than the data storage system using the first design parameters.

12. The method of claim 11 , wherein the initial condition comprises a condition during which the data storage system is operated in a heated environment outside of design operating conditions sufficient to impart a thermal stress on a recording medium used by the data storage system.

13. The method of claim 11 , further comprising determining second design parameters according to a mathematical relationship between the first and third design parameters.

14. A method of optimizing design parameters of a data storage system, the method comprising:

determining first design parameters that optimize the data storage system to operate while experiencing an initial condition;

determining third design parameters that optimize the data storage system to operate while experiencing a predetermined progressive failure condition;

determining second design parameters according to a mathematical relationship between the first and third design parameters; and

storing the first and third design parameters for use by the data storage system,

wherein: the predetermined progressive failure condition simulates conditions occurring after a predetermined number of uses of the data storage system; and

the mathematical relationship used to determine the second design parameters estimates an intermediate condition of the data storage system prior to the predetermined number of uses and after an initial use.

15. A method of optimizing design parameters of a data storage system, the method comprising:

determining first design parameters that optimize the data storage system to operate while experiencing an initial condition;

determining third design parameters that optimize the data storage system to operate while experiencing a predetermined progressive failure condition;

determining second design parameters according to a mathematical relationship between the first and third design parameters; and

storing the first and third design parameters for use by the data storage system,

wherein the second design parameters are averages of the first and third design parameters.

16. A recording and/or reproducing apparatus to record and/or reproduce data with respect to a recording medium, comprising:

a head to record and/or reproduce the data with respect to the recording medium;

a driver to drive said head to record and/or reproduce the data with respect to the recording medium;

a processor to process the data to be recorded and/or reproduced using said head;

a memory to store first and third design parameter sets, the first design parameter set comprising design parameters that optimize the recording and/or reproducing apparatus to operate at an initial condition, and the third design parameter set comprising design parameters that optimize the recording and/or reproducing apparatus to operate at another condition occurring after a preset number of uses; and

a controller to control said driver to drive said head, to detect whether data recording and/or reproducing errors exceed a reference value, and, if the recording and/or reproducing errors exceed the reference value after the recording and/or reproducing apparatus has operated using the first design parameter set, to retrieve the third design parameter set from said memory and to operate the recording and/or reproducing apparatus to record and/or reproduce the data using the third design parameter set.

17. The recording and/or reproducing apparatus of claim 16 , further comprising a FIR filter, wherein:

the first design parameter set comprises a first FIR filter tap optimized to provide minimum error values when the recording and/or reproducing apparatus is operated at the initial condition,

the third design parameter set comprises a third FIR filter tap optimized to provide minimum error values when the recording and/or reproducing apparatus is operated after the preset number of uses, and

said controller controls said FIR filter to exchange the first and third FIR filter taps when the recording and/or reproducing errors exceed the reference value after the recording and/or reproducing apparatus has operated using the first design parameter set.

18. The recording and/or reproducing apparatus of claim 16 , further comprising a low pass filter (LPF), wherein:

the first design parameter set comprises a first LPF coefficient optimized to provide minimum error values when the recording and/or reproducing apparatus is operated at the initial condition,

the third design parameter set comprises a third LPF coefficient optimized to provide minimum error values when the recording and/or reproducing apparatus is operated after the preset number of uses, and

said controller controls said LPF to exchange the first and third LPF coefficients when the recording and/or reproducing errors exceed the reference value after the recording and/or reproducing apparatus has operated using the first design parameter set.

19. The recording and/or reproducing apparatus of claim 16 , wherein:

the first design parameter set comprises first read and/or write current parameters to optimize a read current and/or a write current to provide minimum error values when the recording and/or reproducing apparatus is operated at the initial condition,

the third design parameter set comprises third read and/or write current parameters to optimize the read current and/or the write current to provide minimum error values when the recording and/or reproducing apparatus is operated after the preset number of uses, and

said controller exchanges the first and third read and/or write current parameters when the recording and/or reproducing errors exceed the reference value after the recording and/or reproducing apparatus has operated using the first design parameter set.

20. The recording and/or reproducing apparatus of claim 16 , further comprising an interface with which information is communicated to and from the recording and/or reproducing apparatus, wherein said controller further detects whether the recording and/or reproducing errors occur while operating the recording and/or reproducing apparatus using the third parameter set, and indicates through said interface that the recording and/or reproducing errors occur while operating using the third parameter set.

21. The recording and/or reproducing apparatus of claim 16 , wherein:

said memory further stores a second parameter set corresponding to operating the recording and/or reproducing apparatus at an intermediate condition after the initial condition and prior to the predetermined number of uses, and

if the recording and/or reproducing errors exceed the reference value while the recording and/or reproducing apparatus is operating using the first design parameter set, said controller retrieves the second design parameter set from said memory and operates the recording and/or reproducing apparatus to record and/or reproduce data using the second design parameter set,

if the recording and/or reproducing errors exceed the reference value while the recording and/or reproducing apparatus is operating using the second design parameter set, said controller retrieves the third design parameter set from said memory and operates the recording and/or reproducing apparatus to record and/or reproduce data using the third design parameter set.

22. The recording and/or reproducing apparatus of claim 21 , wherein the second parameter set comprises a mathematical simulation of the intermediate condition based upon the first and third design parameter sets.

23. The recording and/or reproducing apparatus of claim 22 , wherein the second parameter set comprises an average of the first and third parameter sets.

24. The recording and/or reproducing apparatus of claim 16 , wherein:

the initial condition comprises a general burn-in test condition; and

the another condition comprises a progressive failure condition.

25. The recording and/or reproducing apparatus of claim 24 , wherein:

the general burn-in test condition comprises operating the recording and/or reproducing apparatus at an elevated temperature exceeding normal design operating conditions so as to induce thermal stress in the recording medium during the recording and/or reproduction of the data, and

the progressive failure condition is a pre-estimated failure condition in which the recording and/or reproducing apparatus performs off-track writing on a track on the recording medium adjacent to a designated track until failure occurs.

26. A computer readable storage medium encoded with processing instructions for performing a method of operating a recording and/or reproducing apparatus as performed by a computer, the method comprising:

operating the recording and/or reproducing apparatus using a first design parameter set, the first design parameter set comprising parameters optimized to operate the recording and/or reproducing apparatus at an initial condition; and

if errors are detected in the recording and/or reproducing of data with respect to a recording medium after the recording and/or reproducing apparatus has operated using the first design parameter set, exchanging the first design parameter set with a third design parameter set and operating the recording and/or reproducing apparatus using the third design parameter set, the third design parameter set comprising parameters optimized to operate the recording and/or reproducing apparatus at another condition occurring after the operation of the recording and/or reproducing apparatus for a predetermined number of uses.

27. The computer readable storage medium of claim 26 , wherein the another condition comprises a progressive failure condition.

28. The computer readable storage medium of claim 27 , wherein the second parameter set comprises a mathematical simulation of an intermediate condition based upon the first and third design parameter sets.

29. The computer readable storage medium of claim 28 , wherein the second parameter set comprises an average of the first and third parameter sets.

30. The computer readable storage medium of claim 26 , wherein said exchanging the first design parameter set with the third design parameter set comprises:

if the errors are detected in the recording and/or reproducing of the data with respect to the recording medium after the recording and/or reproducing apparatus has operated using the first design parameter set, exchanging the first design parameter set with a second design parameter set and operating the recording and/or reproducing apparatus using the second design parameter set, the second design parameter set corresponding to a mathematical relationship between the first and third design parameter sets, and

exchanging the second design parameter set with the third design parameter set if the errors are detected in the recording and/or reproducing of the data with respect to the recording medium after the recording and/or reproducing apparatus has operated using the second design parameter set.

31. The computer readable storage medium of claim 26 , wherein:

the first design parameter set comprises a first FIR filter tap optimized to provide minimum error values when the recording and/or reproducing apparatus is operated at the initial condition,

the third design parameter set comprises a third FIR filter tap optimized to provide minimum error values when the recording and/or reproducing apparatus is operated after the preset number of uses, and

said exchanging the first design parameter set with the third design parameter set comprises exchanging the first and third FIR filter taps used in a FIR filter of the recording and/or reproducing apparatus.

32. The computer readable storage medium of claim 26 , wherein:

the first design parameter set comprises a first low pass filter (LPF) coefficient optimized to provide minimum error values when the recording and/or reproducing apparatus is operated at the initial condition,

the third design parameter set comprises a third LPF coefficient optimized to provide minimum error values when the recording and/or reproducing apparatus is operated after the preset number of uses, and

said exchanging the first design parameter set with the third design parameter set comprises exchanging the first and third LPF coefficients of an LPF of the recording and/or reproducing apparatus.

33. The computer readable storage medium of claim 26 , wherein:

the first design parameter set comprises first read and/or write current parameters to optimize a read current and/or a write current to provide minimum error values when the recording and/or reproducing apparatus is operated at the initial condition,

the third design parameter set comprises third read and/or write current parameters to optimize the read current and/or the write current to provide minimum error values when the recording and/or reproducing apparatus is operated after the preset number of uses, and

said exchanging the first design parameter set with the third design parameter set comprises exchanging the first and third read and/or write current parameters of the recording and/or reproducing apparatus.

34. The computer readable storage medium of claim 26 , the method further comprising:

detecting whether the errors occur while operating the recording and/or reproducing apparatus using the third parameter set, and indicating that the errors occur while operating the recording and/or reproducing apparatus using the third parameter set through an interface used by the recording and/or reproducing apparatus to communicate information.

35. The computer readable storage medium of claim 26 , wherein:

the initial condition is a general burn-in test condition in which the recording and/or reproducing apparatus is operated at an elevated temperature exceeding normal design operating conditions so as to induce thermal stress in the recording medium during the recording and/or reproduction of the data, and

the another condition comprises a pre-estimated progressive failure condition in which the recording and/or reproducing apparatus performs off-track writing on a track on the recording medium adjacent to a designated track until failure occurs.