Abstract: A method of producing data storage card for storage of machine-readable information includes an optical memory area subjected to optical information recording and reproduction, comprising, a card-like card body, an optical recording portion provided on the card body. A method of combining a file access system with a write once optical data card produces a secure portable database system.

Abstract: This invention discloses a flat data storage medium that includes a plurality of substantially parallel data arc-segments. The data arcs further include at least one full circle data track provided for obtaining a measurement of an average amplitude of data signals over the full circle data track for calibrating a pickup head implemented for reading data from the data arc-segments. This invention further discloses a data storage system for accessing data stored in a data storage medium. The data storage system includes dynamic head loading/unloading system that includes a handle for pushing a linkage connected to the handle for loading and unloading the data storage medium to an engaged and disengaged positions relative to a pickup head for accessing data disposed on the data storage medium. The dynamic head loading/unloading system further includes a locking mechanism for automatically locking the data storage medium inside the data storage system when the linkage is disposed at an engaged-position.

Abstract: This invention discloses a data access system for access data stored on a flat medium. The data access system includes a pickup head rotating over the flat medium. The data access system further includes at least one stepping motor for discretely moving the flat medium substantially along at least one lateral direction perpendicular to a rotational axis of the pickup head. The data access system further includes a closed loop control mechanism for controlling the stepping motor for allowing the pickup head to read data from a servo segment on the flat medium. The controller further includes an open loop control mechanism for rotating the pickup head for reading data from and writing data to a data segment disposed right next to the servo segment on the flat medium.

Abstract: This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The magnetic servo writer further includes a control circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a servo pattern layout circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium with predefined servo patterns. The magnetic servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on the magnetic flat data-storage medium.

Abstract: The optical data-storage card includes an optical data-storage medium layer supported on the card. The data-storage medium layer includes a plurality of data storage tracks for storing data therein. Each of the tracks having at least an arc-segment wherein each of the data storage tracks being substantially parallel to a neighboring track.

Abstract: This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The magnetic servo writer further includes a control circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a servo pattern layout circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium with predefined servo patterns. The magnetic servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on the magnetic flat data-storage medium.

Abstract: This invention discloses a flat data storage medium that includes a plurality of substantially parallel data arc-segments. The data arcs further include at least one full circle data track provided for obtaining a measurement of an average amplitude of data signals over the full circle data track for calibrating a pickup head implemented for reading data from the data arc-segments. This invention further discloses a data storage system for accessing data stored in a data storage medium. The data storage system includes dynamic head loading/unloading system that includes a handle for pushing a linkage connected to the handle for loading and unloading the data storage medium to an engaged and disengaged positions relative to a pickup head for accessing data disposed on the data storage medium. The dynamic head loading/unloading system further includes a locking means for automatically locking the data storage medium inside the data storage system when the linkage is disposed at an engaged-position.

Abstract: This invention discloses an optical data-card drive system. The drive system includes an optical pickup head for rotationally moving over and accessing data stored in the optical data-card. The optical pickup head is provided for reading data from and writing data to the optical data card. The optical pickup head may be applied for accessing data over substantially one-half of the rotational movement. In another preferred embodiment, the optical pickup head is applied for accessing data over several arc-segments during the rotational movement. The optical pickup head may be design for rotating in a single rotational direction, or for rotating in clockwise and counterclockwise directions. Furthermore, the optical pickup head may be designed for rotating over arc segment having radius smaller than half-width of the optical data card, or for rotating over an arc segment having a radius greater than half-width of the optical data card.

Abstract: This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The magnetic servo writer further includes a control circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a servo pattern layout circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium with predefined servo patterns. The magnetic servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on the magnetic flat data-storage medium.

Abstract: An optical data-card is disclosed in this invention. The optical data-storage card includes an optical data-storage medium layer supported on the card. The data-storage medium layer includes a plurality of data storage tracks for storing data therein. Each of the tracks comprising at least an arc-segment wherein each of the data storage tracks being substantially parallel to a neighboring track.

Abstract: This invention discloses an optical servo writer. The optical servo writer includes an optical pickup head for rotationally moving over and writing servo data in an optical flat data-storage medium. The optical servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The optical servo writer further includes a control circuit for controlling The optical pickup head for writing the servo data on The optical flat data-storage medium. The optical servo writer further includes a servo pattern layout circuit for controlling The optical pickup head for writing the servo data on The optical flat data-storage medium with predefined servo patterns. The optical servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on The optical flat data-storage medium.

Abstract: This invention discloses a magnetic data-card drive system. The drive system includes a magnetic pickup head for rotationally moving over and accessing data stored in the magnetic data-card. The magnetic pickup head is provided for reading data from and writing data to the magnetic data card. The magnetic pickup head may be applied for accessing data over substantially one-half of the rotational movement. In another preferred embodiment, the magnetic pickup head is applied for accessing data over several arc-segments during the rotational movement. The magnetic pickup head may be design for rotating in a single rotational direction, or for rotating in clockwise and counterclockwise directions. Furthermore, the magnetic pickup head may be designed for rotating over arc segment having radius smaller than half-width of the magnetic data card, or for rotating over an arc segment having a radius greater than half-width of the magnetic data card.

Abstract: This invention discloses an optical data access system. The optical data access system includes an optical flat data storage medium. The optical data access system further includes a data access drive system for driving an optical pickup head for performing a rotational movement over the flat data storage medium for accessing data over an arc segment on the optical flat data storage medium. And, the optical data access system further including a controller for controlling a data transfer between the data access drive system and the optical flat data storage medium. In a preferred embodiment, the optical flat data storage medium is an optical data card. In a different preferred embodiment, an optical pickup head is provided for accessing data over substantially one-half of the rotational movement.

Abstract: This invention discloses a data access system for access data stored on a flat medium. The data access system includes a pickup head rotating over the flat medium. The data access system further includes at least one stepping motor for discretely moving the flat medium substantially along at least one lateral direction perpendicular to a rotational axis of the pickup head. The data access system further includes a closed loop control mechanism for controlling the stepping motor for allowing the pickup head to read data from a servo segment on the flat medium. The controller further includes an open loop control mechanism for rotating the pickup head for reading data from and writing data to a data segment disposed right next to the servo segment on the flat medium.

Abstract: The magnetic data-storage card includes a magnetic data-storage medium layer adhering to the card. The data-storage medium layer includes a plurality of data storage tracks for storing data therein. Each of the tracks having at least an arc-segment wherein each of the data storage tracks being substantially parallel to a neighboring track.