Disk Drive Profile Table Tuning for Seek Time Optimization
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Solution Overview
Problem
Manufacturing different types of disk drives with varying storage capacities and numbers of heads requires optimized tunings to meet targeted seek time performance levels, increasing workload and costs for manufacturers.
Innovation Solution
A method involving a programmable profile table with constant offset values is used to adjust the performance level of disk drives from an initial to a target level, utilizing a computer to determine and program these values in the disk drive's memory, allowing for adaptive seek operations and matching performance levels between different disk drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optimized tunings are performed for each type of disk drive to meet targeted seek time performance levels, then seek time performance is improved, but manufacturing workload and costs increase
Solution Approach 1:
The patent applies universality by creating a single tuning profile that can be used across multiple disk drive types with different storage capacities and numbers of heads. Instead of developing separate optimized tunings for each drive configuration, the invention establishes a universal tuning methodology that adapts to various drive types, thereby reducing manufacturing workload while maintaining seek time performance requirements.
Solution Approach 2:
The patent utilizes parameter changes by adjusting key tuning parameters (such as velocity profiles, acceleration rates, and positioning constants) to accommodate different disk drive configurations. By identifying which parameters need to be modified for each drive type and which can remain constant, the invention reduces the overall tuning workload while ensuring each drive type meets its performance targets.
2Manufacturing precision
If optimized tunings are performed for each type of disk drive to meet targeted seek time performance levels, then seek time performance is improved, but manufacturing costs increase
Solution Approach 1:
The patent reduces manufacturing costs by establishing a universal tuning approach that can be applied across multiple disk drive types. This eliminates the need for separate, expensive optimization processes for each drive configuration, thereby reducing overall manufacturing costs while maintaining the required seek time performance levels through standardized tuning procedures.
Solution Approach 2:
The patent applies copying by creating a master tuning profile that can be replicated and adapted for different disk drive types. Instead of performing independent optimization for each drive type, the invention copies and modifies the base tuning profile as needed, significantly reducing the time and resources required for tuning while maintaining performance requirements.
3Adaptability or versatility
If different types of disk drives are manufactured with varying storage capacities and numbers of heads, then product versatility is improved, but the complexity of maintaining uniform performance levels increases
Solution Approach 1:
The patent addresses the complexity of maintaining uniform performance across diverse drive types by creating a universal tuning framework. This framework provides a standardized approach that works across different storage capacities and head configurations, simplifying the tuning process while maintaining product versatility and performance uniformity.
Solution Approach 2:
The patent applies segmentation by dividing the tuning process into distinct, manageable components that can be independently adjusted for different drive types. By segmenting the tuning parameters into categories (such as velocity profiles, positioning constants, and acceleration rates), the invention makes it easier to maintain uniform performance levels across diverse product lines without increasing overall complexity.
Data Source
AI summary
A method or apparatus for changing a performance level of a disk drive from an initial performance level to a target performance level, wherein the disk drive includes a profile table. The method including determining an initial performance level, determining a target performance level, determining constant offset values that cause the performance level of the disk drive to match the target performance level, and programming a constant offset table of the profile table with the constant offset values.