Multi-Track Magnetic Head for Signal-to-Noise Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional data storage systems face challenges in achieving improved signal-to-noise ratio (SNR) and increased recording density without increasing noise or power consumption, and existing methods to enhance data read rates lead to higher error rates.
Innovation Solution
A magnetic head with multiple sensors arranged to simultaneously read multiple adjacent data tracks, where none share more than one lead with another sensor, and a controller to recover data from each sensor, allowing for improved SNR and reduced read errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If recording density is increased by miniaturization, then storage capacity is improved, but noise increases
Solution Approach 1:
The invention divides the reading function into multiple independent sensors (first sensor, second sensor, third sensor) that simultaneously read different tracks. This segmentation allows the system to distribute the reading load and improve signal quality without increasing noise from a single sensor, thereby maintaining storage capacity improvements while mitigating noise issues.
Solution Approach 2:
The invention combines the outputs of multiple sensors through signal processing (including summation and weighting) to produce an enhanced read signal. By merging signals from multiple sensors reading adjacent tracks, the system achieves better signal-to-noise ratio and reduced read errors, allowing higher recording density without the noise penalty normally associated with miniaturization.
2Measurement precision
If reader sensitivity is increased to improve resolution, then reading capability is improved, but achievable limits are reached
Solution Approach 1:
Instead of increasing sensitivity in a single dimension, the invention adds a spatial dimension by deploying multiple sensors across different tracks. This multi-dimensional approach to reading allows the system to achieve improved resolution and overcome sensitivity limits by distributing the reading function across multiple spatial locations rather than relying on a single high-sensitivity sensor.
3Productivity
If data read rate is increased by spinning HDD faster, then access time is reduced, but power consumption and error rates increase
Solution Approach 1:
The invention segments the data reading function across multiple sensors that operate simultaneously on different tracks. This parallel reading capability allows the system to achieve higher effective data read rates without increasing the rotational speed of the HDD, thereby avoiding the associated increases in power consumption and error rates that would result from spinning the disk faster.
Data Source
AI summary
A system according to one embodiment includes a magnetic head having a plurality of sensors arranged to simultaneously read at least three immediately adjacent data tracks on a magnetic medium, wherein none of the sensors share more than one lead with any other of the sensors. Such embodiment may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.