In-situ determination of landing zone transition for improved disk drive reliability

A method for use in writing servo information on a data storage disk, comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof;
• mounting said disk in a servo track writer (STW) so that a first transducer is adjacent to said first surface;
• determining a location of an edge of said textured landing zone using said first transducer of said STW;
• and
• writing a first servo track on said first surface of said disk a predetermined distance from said edge of said textured landing zone using a second transducer.

An apparatus for use in writing servo information on a surface of a data storage disk, said surface having a textured landing zone, said apparatus comprising:

• means for determining a location of an edge of said textured landing zone on said surface of said data storage disk;
• means for writing a first servo track on said surface of said data storage disk using said location of said edge of said textured landing zone as a reference, wherein said means for writing writes said first servo track a predetermined radial distance from said location of said edge;
• and
• a memory for storing a value for said predetermined radial distance used in writing said first servo track.

A method for use in writing servo information on disk drive storage media comprising the steps of:

• providing a plurality of disks arranged in a substantially coaxial disk stack, each of said plurality of disks having a textured landing zone on at least one surface thereof, each textured landing zone having a first edge;
• determining a worst case first edge location for said plurality of disks, said worst case first edge location being either an innermost first edge location or an outermost first edge location;
• and
• using said worst case first edge location as a reference for writing servo information on said plurality of disks.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, said textured landing zone having a first edge;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• using said location of said first edge as a reference for writing servo information on said first surface of said disk,
• wherein said step of determining a location includes moving a transducer to a first radial position with respect to said disk and subsequently moving said transducer in a substantially radial direction with respect to said disk from said first radial position while monitoring a signal generated by said transducer, and
• wherein said step of determining a location includes processing said signal in a bandpass filter to generate a filtered signal.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, said textured landing zone having a first edge;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• using said location of said first edge as a reference for writing servo information on said first surface of said disk,
• wherein said step of determining a location includes moving a transducer to a first radial position with respect to said disk and subsequently moving said transducer in a substantially radial direction with respect to said disk from said first radial position while monitoring a signal generated by said transducer, and
• wherein said step of determining a location includes detecting a predetermined occurrence within said signal and recording a radial position of said transducer in response thereto.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, said textured landing zone having a first edge;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• using said location of said first edge as a reference for writing servo information on said first surface of said disk,
• wherein said step of determining a location includes moving a transducer to a first radial position with respect to said disk and subsequently moving said transducer in a substantially radial direction with respect to said disk from said first radial position while monitoring a signal generated by said transducer, and
• wherein said transducer includes a piezoelectric element that generates an electrical vibration signal indicative of a physical vibration of said piezoelectric element.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, wherein said textured landing zone has a first edge, wherein said textured landing zone is located at an outer diameter of said first surface of said disk and wherein said first edge is an inner edge of said textured landing zone;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• and
• using said location of said first edge as a reference for writing servo information on said first surface of said disk.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, said textured landing zone having a first edge;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• using said location of said first edge as a reference for writing servo information on said first surface of said disk,
• wherein said step of determining a location includes moving a transducer to a first radial position with respect to said disk and subsequently moving said transducer in a substantially radial direction with respect to said disk from said first radial position while monitoring a signal generated by said transducer,
• and wherein said first transducer includes a piezoelectric element.

A method for use in writing servo information on a data storage disk, comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof;
• mounting said disk in a servo track writer (STW) so that a first transducer is adjacent to said first surface, said first transducer including a piezoelectric element;
• determining a location of an edge of said textured landing zone using said piezoelectric element of said first transducer;
• and
• writing a first servo track on said first surface of said disk a predetermined distance from said edge of said textured landing zone.

An apparatus for use in writing servo information on a surface of a data storage disk, said surface having a textured landing zone, said apparatus comprising:

• means for determining a location of an edge of said textured landing zone on said surface of said data storage disk;
• means for writing a first servo track on said surface of said data storage disk using said location of said edge of said textured landing zone as a reference,
• wherein said means for determining a location includes means for moving a transducer in a radial direction with respect to said disk while monitoring a signal generated by said transducer, and
• wherein said means for determining a location includes means for detecting a predetermined occurrence within said signal and means for recording an indication of transducer position in response thereto.

An apparatus for use in writing servo information on a surface of a data storage disk, said surface having a textured landing zone, said apparatus comprising:

• means for determining a location of an edge of said textured landing zone on said surface of said data storage disk;
• means for writing a first servo track on said surface of said data storage disk using said location of said edge of said textured landing zone as a reference;
• and
• means for mounting a plurality of data storage disks in a coaxial stack arrangement, wherein said means for determining a location determines a worst case edge location for said plurality of data storage disks.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, said textured landing zone having a first edge;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• and
• using said location of said first edge as a reference for writing servo information on said first surface of said disk, wherein said servo information is written from said first edge towards an outer diameter of said first surface when said landing zone is located at an inner diameter of the first surface.

A method for use in writing servo information on a surface of a data storage disk comprising the steps of:

• providing a disk having a textured landing zone on a first surface thereof, said textured landing zone having a first edge;
• determining a location of said first edge of said textured landing zone on said first surface of said disk;
• and
• using said location of said first edge as a reference for writing servo information on said first surface of said disk, wherein said servo information is written from said first edge towards an inner diameter of said first surface when said landing zone is located at an outer diameter of the first surface.