Method for eliminating wiggle of magnetic head in hard disk drive

In a hard disk drive having a first and a second magnetic heads that are integrally connected and move together, a method of eliminating a charged state in said first magnetic head by examining electrical characteristics of said second magnetic head, said method comprising the steps of:

• providing said first magnetic head initially in a charged state, and said second magnetic head not in a charged state;
• moving said first magnetic head from a servo area to a parking area when said first magnetic head is in a charged state;
• checking whether said first magnetic head is in said parking area by examining the location of said second magnetic head;
• performing a remote write operation on said first magnetic head located in said parking area;
• moving said first magnetic head and said second magnetic head back to the servo area of said hard disk;
• determining if said first magnetic head is still in a charged state;
• and
• repeating the moving, checking and performing a remote write operation steps if said first magnetic head is still in a charged state.

In a hard disk drive comprising a first and a second magnetic head that move together, a method for removing wiggle from said first magnetic head comprising the steps of:

• providing said second magnetic head is absent a wiggle;
• attempting to move both said first and said second magnetic heads to a parking area of a hard disk;
• measuring the electrical characteristics of said second magnetic head to determine if said first magnetic head is in said parking area;
• applying a write current to said first magnetic head to remove said wiggle if it is determined that said first magnetic head is positioned in said parking area of said hard disk;
• determining whether said wiggle has been removed from said first magnetic head;
• and
• repeating the moving, measuring, and applying a write current steps if it is determined that said wiggle is still not removed from said first magnetic head.

A hard disk drive, comprising:

• a first magnetic bead;
• a second magnetic head that is absent a wiggle, said second magnetic head moves in tandem with said first magnetic head to various locations on a hard disk;
• a hard disk having a servo area and a parking area;
• means for coincidently moving both said first magnetic head and said second magnetic head from said servo area of said hard disk to said when said first magnetic head contains wiggle;
• and
• a pass counter and a fail counter to determine whether said first magnetic head is located in said parking zone of said hard disks.

A method of operating a hard disk drive having a plurality of magnetic heads, comprising:

• moving a first magnetic head coupled to move in tandem with a second magnetic head, from a servo area to a parking zone when said first magnet head generates wiggle during use;
• attempting to move both said first and said second magnetic heads to a parking area of said hard disk;
• measuring electrical characteristics of said second magnetic head to determine whether said first magnetic head is within said parking area;
• applying a write current to said first magnetic head to remove said wiggle when said first magnetic head is determined to be within said parking area;
• making a determination of whether said wiggle has been removed from said first magnetic head;
• and
• repeating said steps of attempting to move said first magnetic head to said parking area, measuring said electrical characteristics of said second magnetic head and applying a write current to said first magnetic head when said determination establishes that said wiggle has not been removed from said first magnetic head.

An apparatus providing correction of wiggle by one of a plurality of magnetic heads, said apparatus comprising:

• a hard disk drive;
• a first magnetic head selected from among said plurality of magnetic heads;
• a second magnetic head selected from among said plurality of magnetic heads, said second magnetic head being integrally coupled to move in tandem with said first magnetic head;
• a rotatable memory disk exhibiting a plurality of sets of concentric circular zones each associated with a different one of said plurality of magnetic heads and each comprised of a parking area, and a servo area;
• a failure counter maintaining a count of a number of times that a servo address mark is detected within a corresponding said servo area by said second magnetic head while said second magnetic head exhibits no wiggle after said hard disk drive has begun to move said first magnetic head to said parking zone when wiggle is occurring in said first magnetic head;
• and
• a pass counter maintaining a count of a number of times that said servo address mark is not detected by said second magnetic head while said second magnetic head exhibits no wiggle after said hard disk drive has begun to move said first magnetic head to said parking zone.