Hybrid MR Read Element Stabilization for Legacy and Present Data
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Solution Overview
Problem
Magnetic recording systems face challenges in reading legacy data due to differing trackwidths, leading to signal-to-noise issues when using readers designed for narrower present data tracks, necessitating additional hardware to read legacy data effectively, which increases costs.
Innovation Solution
A hybrid magneto-resistive (MR) device with multiple MR read elements and strategically positioned permanent magnets to stabilize each element, allowing for simultaneous reading of both legacy and present data tracks with optimized signal-to-noise ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a present data reader is configured to read at narrow trackwidth, then present data can be read effectively, but legacy data reading suffers from signal-to-noise issues due to insufficient media sampling
Solution Approach 1:
The patent divides the read device into two separate MR read elements: one optimized for narrow trackwidth present data and another for wide trackwidth legacy data. Each reader is independently configured with appropriate permanent magnets and sampling characteristics to handle its specific data type, eliminating the compromise that would result from using a single reader for both purposes.
Solution Approach 2:
The patent creates a universal read device capable of handling both present data and legacy data by integrating multiple specialized readers. The system achieves multi-functionality by combining readers with different trackwidth optimizations, allowing the same device to effectively read both narrow and wide tracks without requiring separate dedicated devices.
2Adaptability or versatility
If a legacy data reader is added to read legacy data at greater trackwidths, then legacy data reading capability is improved, but device cost increases significantly
Solution Approach 1:
The patent merges multiple specialized MR read elements into a single integrated read device. By combining the present data reader and legacy data reader into one unified structure with shared permanent magnets and control circuitry, the patent achieves legacy data reading capability while minimizing the cost and complexity increase that would result from completely separate devices.
Solution Approach 2:
The integrated read device achieves universality by incorporating multiple readers with different trackwidth optimizations. This allows a single device to handle both present data and legacy data formats, eliminating the need for separate dedicated readers and reducing overall system cost and complexity.
3Quantity of substance
If the trackwidth of legacy data is greater than present data, then legacy data can be stored with larger spacing, but present data readers cannot sample enough media to achieve adequate signal-to-noise ratio when reading legacy data
Solution Approach 1:
The patent applies local quality by configuring each MR read element with specific permanent magnet arrangements and sampling geometries optimized for its intended trackwidth. The legacy data reader is designed with wider sampling characteristics to capture sufficient magnetic signal from widely-spaced tracks, while the present data reader maintains narrow sampling for high-density tracks.
Solution Approach 2:
The patent changes key parameters of each MR read element including permanent magnet strength, spacing, and orientation to optimize performance for different trackwidths. The legacy data reader uses parameters configured for greater media sampling volume to achieve adequate signal-to-noise ratio despite the wider spacing between magnetic transitions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables stable and efficient reading of both legacy and present data tracks without the need for separate readers, optimizing signal quality and reducing costs by independently stabilizing and optimizing each MR read element for specific data types.
Implementation Method 1
The first MR read element is positioned between the first and the second permanent magnets to stabilize the first MR read element while reading the legacy data from the media
Implementation Method 2
a magneto-resistive (MR) device for reading at least one of a legacy data and a present data magnetically recorded on at least one legacy track and a least one present track
Data Source
AI summary
A magneto-resistive (MR) device for reading at least one of a legacy data and a present data magnetically recorded on at least one legacy track and a least one present track, respectively, is provided. The device comprises first and second MR elements, and first, second, and third permanent magnets. The first MR read element is positioned between the first and the second permanent magnets to stabilize the first MR read element while reading the legacy data from the media. The second MR element is positioned adjacent to the second permanent magnet and configured to read the present data from the media. The third permanent magnet is positioned adjacent to the second MR element and opposite to the second permanent magnet. The second and the third permanent magnets cooperate with each other to stabilize the second MR read element while reading the present data from the media.