Magnetic Disk Retain and Exchange System
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Solution Overview
Problem
Current archival data storage solutions, such as magnetic tape, are slow in accessing data, and there is a need for a cost-effective and efficient method to manage large numbers of magnetic disks in hard disk drives (HDDs) for rapid data retrieval and storage.
Innovation Solution
A magnetic disk retain and exchange system utilizing a spindle motor assembly with a permanent magnet retainer and a disk exchange tool with electromagnets to securely attach and detach disks from the spindle motor, allowing for efficient installation and removal of disks within a data storage library.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If magnetic tape is used for archival data storage, then data storage capacity and cost-effectiveness are improved, but data access speed deteriorates
Solution Approach 1:
The patent replaces the mechanical tape transport system with a magnetic field-based disk system. Instead of physically moving tape past read/write heads, the system uses electromagnetic fields to rapidly access data on rotating magnetic disks, eliminating the mechanical constraints that limit tape access speed while maintaining cost-effective storage capacity
Solution Approach 2:
The patent changes the fundamental storage medium parameter from linear magnetic tape to rotational magnetic disks. This parameter change enables random access capabilities and significantly improves data retrieval speed while maintaining high storage density, as disks allow simultaneous access to multiple data locations through rotational positioning
2Device complexity
If manual disk handling is used, then device complexity is reduced, but contamination and mechanical stress increase
Solution Approach 1:
The patent introduces a magnetic retainer as an intermediary component between the disk and handling mechanisms. This magnetic retainer enables contactless or minimal-contact disk retention and transfer through magnetic fields, eliminating the need for direct mechanical grasping that causes contamination and stress, while maintaining simple overall system architecture
Solution Approach 2:
The patent replaces manual mechanical disk handling with an automated magnetic retention system. Disks are held and transferred through magnetic fields rather than mechanical grippers, eliminating finger contact that causes contamination and reducing mechanical stress points on delicate disk surfaces
3Stability of the object's composition
If strong mechanical retention is used to hold disks, then disk stability is improved, but disk stress and potential damage increase
Solution Approach 1:
The patent replaces strong mechanical retention forces with magnetic retention forces. The magnetic retainer holds disks through electromagnetic attraction, providing sufficient stability during operation without the concentrated mechanical pressure points that could damage delicate disk surfaces or cause stress fractures
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
This system enables reliable, low-stress disk swapping with minimal mechanical stress and contamination, reducing costs and improving data access speed compared to traditional methods, while maintaining disk stability and longevity.
Implementation Method 1
a permanent magnet retainer coupled with the spindle motor, by applying current in a first direction to a first electromagnet of a disk exchange tool holding the disk media assembly to rotate the spindle motor assembly to magnetically align the ferromagnetic material of the disk media assembly with the permanent magnet retainer of the spindle motor assembly
Implementation Method 2
applying current in a first direction to a first electromagnet of a disk exchange tool holding the disk media assembly
Implementation Method 3
a spindle motor assembly with a permanent magnet retainer and a disk exchange tool with electromagnets to securely attach and detach disks from the spindle motor
Data Source
AI summary
A disk media retaining and exchange system configured to accept a disk media assembly including a disk and a ferromagnetic material coupled therewith, includes a spindle motor assembly with a spindle motor and a permanent magnet retainer coupled therewith, whereby the system is configured to retain the disk on the spindle motor by a magnetic force between the ferromagnetic material of the disk media assembly and the permanent magnet retainer of the spindle motor assembly. An electromagnet disk exchange tool may be employed, configured such that energization of coils in close proximity to the disk media assembly overcomes the magnetic force to release the disk media assembly from retention with the spindle motor assembly, and generates another magnetic force between the ferromagnetic material of the disk media assembly and at least one electromagnet of the exchange tool to remove the disk away from the spindle motor for disk exchange.