Disk-to-Disk Spacing Reduction via Dynamic Head and Disk Positioning
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Solution Overview
Problem
Current data storage devices face challenges in increasing volumetric density due to the fixed spacing between disks, which limits the number of disks that can be stacked within a given volume, leading to inefficiencies in storage capacity and cost.
Innovation Solution
The implementation of a data storage system that reduces disk-to-disk spacing by using a fewer number of heads than disks, allowing a single set of heads to move vertically and rotate to access different disks, thereby reducing the volume required for heads and increasing the number of disks that can be stacked within the same form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of heads is reduced to fewer than the number of disks, then volumetric density is improved and cost is reduced, but the heads must move vertically and rotate to access different disks which increases device complexity
Solution Approach 1:
The head assembly is made dynamic with vertical translation capability and rotational capability, allowing a single head to access multiple disks. The actuator mechanism translates the head assembly vertically between disks and rotates it to orient the correct head toward the target disk surface, enabling fewer heads to serve more disks through dynamic repositioning.
Solution Approach 2:
The system adds vertical dimension movement to head positioning. Instead of heads being fixed at specific radial positions only, the head assembly can now move in the vertical direction between disks and rotate to access different disk surfaces, utilizing three-dimensional space to reduce the number of heads required.
2Quantity of substance
If disk-to-disk spacing is reduced to increase the number of disks in the same form factor, then volumetric density is improved, but the risk of head collision with non-active disks increases
Solution Approach 1:
Disks are made dynamically positionable with respect to the head assembly. The actuator mechanism can translate specific disks vertically toward or away from the head, and rotate them to present their surfaces to the head. This dynamic positioning allows disks to be moved out of the head's path when not in use, eliminating collision risk even at reduced spacing.
Solution Approach 2:
The actuator mechanism serves as an intermediary between the head assembly and disks, controlling their relative positions. It manages the vertical translation and rotation of both heads and disks, ensuring that only the intended disk is accessed while others are positioned safely away from the head path.
3Use of energy by moving object
If non-active disks are kept stationary to minimize power consumption, then energy efficiency is improved, but the heads cannot access different disks which reduces productivity
Solution Approach 1:
The system implements selective dynamics where only the active disk and head assembly are moved during operations, while other disks remain stationary. The actuator mechanism translates and rotates only the necessary components for current operations, keeping non-active disks stationary to save energy while maintaining full disk access capability when needed.
Solution Approach 2:
Disk movement and rotation occur periodically only when access is required. The actuator mechanism moves disks into the head's access position on demand, keeps them stationary during non-access periods to conserve energy, and repeats this periodic action as different disks need to be accessed, balancing energy efficiency with productivity.
Data Source
AI summary
A data storage system includes a data storage foil mounted within the data storage system, the data storage foil has at least one data storage surface. The data storage system also includes a head configured to interact with the at least one data storage surface to carry out at least one of data read or data write operations.