Recording current optimization method of hard disk drive, recording medium storing program to execute the method and apparatus employing the same
First Claim
1. A method of optimizing a recording current provided to a recording head of a hard disk drive, the method comprising:
- optimizing the recording current according to a change of a driving voltage of a pre-amplifier generating the recording current,wherein the optimizing of the recording current comprises;
detecting the driving voltage of the pre-amplifier;
determining a voltage difference between the detected driving voltage and a reference driving voltage; and
adjusting the recording current according to the determined voltage difference and a recording current compensation value.
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Abstract
A recording current optimization method to optimize a recording current according to a change of a driving voltage applied to a pre-amplifier that generates the recording current supplied to a head, a recording medium storing a program that executes the method, and an apparatus that employs the method. The method of optimizing the recording current provided to the recording head of the hard disk drive includes detecting a driving voltage of the pre-amplifier, determining a voltage difference between the detected driving voltage and a reference driving voltage of the pre-amplifier, and optimizing the recording current according to the determined voltage difference. The recording current is adaptively optimized according to the change of the pre-amplifier driving power to provide the recording current to the head such that adjacent track erasure (ATE) and weak write (WW) are prevented from occurring due to the change of the driving power.
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Citations
32 Claims
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1. A method of optimizing a recording current provided to a recording head of a hard disk drive, the method comprising:
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optimizing the recording current according to a change of a driving voltage of a pre-amplifier generating the recording current, wherein the optimizing of the recording current comprises; detecting the driving voltage of the pre-amplifier; determining a voltage difference between the detected driving voltage and a reference driving voltage; and adjusting the recording current according to the determined voltage difference and a recording current compensation value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A recording medium having executable code stored thereon to perform a method of optimizing a recording current provided to a recording head of a hard disk drive, the method comprising:
optimizing the recording current according to a change of a driving voltage of a pre-amplifier generating the recording current by adjusting at least one of a DC (direct current) component of the recording current and an over shoot current (OSC) of the recording current.
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8. A computer-readable recording medium having recorded thereon executable code to perform a method of optimizing a recording current provided to a recording head of a hard disk drive, the method comprising:
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optimizing the recording current according to a change of a driving voltage of a pre-amplifier generating the recording current, wherein the optimizing of the recording current comprises; detecting the driving voltage of the pre-amplifier; determining a voltage difference between the detected driving voltage and a reference driving voltage; and adjusting the recording current according to the determined voltage difference and a recording current compensation value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A hard disk drive comprising:
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a head to write/read information to/from a disk in response to a recording current; a pre-amplifier to generate the recording current provided to the head according to data provided from a read/write channel or to automatically control a gain of a reproducing current provided from the head to the read/write channel; a voltage detector to detect a driving voltage applied to the pro-amplifier; and a controller to optimize the recording current according to a voltage difference between the detected driving voltage of the pro-amplifier detected by the voltage detector and a reference driving voltage of the pro-amplifier and a recording current compensation value. - View Dependent Claims (16)
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17. A hard disk drive, comprising:
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at least one disk; a head to read and/or write from and/or to the at least one disk; a preamplifier to provide a current to the head such that the head operates based on the current; and a controller to adjust at least one component of the current based on a detected driving voltage of the preamplifier, wherein the controller compares the detected driving voltage to a reference voltage to determine a voltage difference and accesses a pro-stored table to determine a current correction value corresponding to the determined voltage difference from among a plurality of current correction values corresponding to a plurality of voltage differences. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A hard disk drive, comprising:
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at least one disk; a head to read and/or write from and/or to the at least one disk; a preamplifier to provide a current to the head such that the head operates based on the current; and a controller to determine a gain with which the preamplifier amplifies data read from the at least one disk and to adjust at least one component of the current provided to the head such that the gain of the preamplifier approaches a predetermined reference gain.
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24. A hard disk drive, comprising:
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at least one disk; a head to read and/or write from and/or to the at least one disk; a preamplifier to provide a recording current to the head such that the head operates based on the recording current; and a controller to determine a driving voltage of the preamplifier, to perform a first adjustment operation on the recording current based on the determined driving voltage of the preamplifier, to determine a gain with which the preamplifier amplifies data read from the at least one disk, and to perform a second adjustment operation on the recording current based on the determined gain of the preamplifier.
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25. A control apparatus of a hard disk drive having at least one disk and a head to read and/or write from and/or to the at least one disk, the apparatus comprising:
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a preamplifier to provide a current to the head such that the head operates based on the current; and a controller to determine a gain with which the preamplifier amplifies data read from the at least one disk and to adjust at least one component of the current provided to the head such that the gain of the preamplifier approaches a predetermined reference gain.
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26. A method of optimizing a recording current in hard disk drive having at least one disk and a head to read and/or write from and/or to the at least one disk, the method comprising:
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controlling a preamplifier to provide a current to the head such that the head operates based on the current; and adjusting at least one component of the current provided by the preamplifier to the head based on a detected driving voltage of the preamplifier wherein the adjustment of the at least one component of the current comprises; comparing the detected driving voltage to a reference voltage to determine a voltage difference; and accessing a pre-stored table to determine a current correction value corresponding to the determined voltage difference from among a plurality of current correction values corresponding to a plurality of voltage differences. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A method of optimizing current in a hard disk drive having at least one disk and a head to read and/or write from and/or to the at least one disk, the method comprising:
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controlling a preamplifier to provide a recording current to the head such that the head operates based on the recording current; determining a driving voltage of the preamplifier; performing a first adjustment operation on the recording current based on the determined driving voltage of the preamplifier; determining a gain with which the preamplifier amplifies data read from the at least one disk; and performing a second adjustment operation on the recording current based on the determined gain of the preamplifier.
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Specification