Drive Interlock Prevents Removal During Medium Rotation

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Solution Overview

Problem

Conventional computer systems face damage risks when attempting to remove a disk drive from a receptacle while the medium is in motion, leading to potential head crashes or mechanical damage due to improper handling.

Innovation Solution

A system with a locking mechanism and interlock that prevents physical removal of the drive from the receptacle when the medium is in motion, using a processing circuit to control the interlock and ensure safe removal only when the medium is stationary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the drive is allowed to be removed freely from the receptacle, then the ease of operation is improved, but the reliability deteriorates due to potential head crashes and mechanical damage when the medium is in motion

Engineering Contradiction:

Improveease of drive removalVSAvoiddrive component safety

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

An interlock mechanism is introduced as an intermediary between the locking mechanism and the drive removal process. The interlock detects medium motion and conditionally prevents the locking mechanism from allowing removal, thus mediating between user convenience and drive safety

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system continuously monitors the motion state of the medium through sensors and provides feedback to the interlock mechanism. When motion is detected, the feedback signal triggers the interlock to prevent removal, creating a closed-loop control system that adapts to real-time conditions

Inventive Principle:

Principle #23Feedback

2Reliability

If a locking mechanism with interlock is implemented to prevent removal during motion, then the reliability is improved, but the device complexity increases

Engineering Contradiction:

Improvedrive component safetyVSAvoidremoval control mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The interlock serves as a relatively simple intermediary component that bridges the monitoring system and the locking mechanism. Rather than redesigning the entire removal system, the interlock is added as a modular safety layer that manages complexity through functional separation

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces complex mechanical motion detection mechanisms with sensor-based detection systems. This substitution uses electronic sensing and control rather than purely mechanical interlocks, reducing mechanical complexity while maintaining reliability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10217492B2Preventing physical removal of a drive with a medium in motion for mitigating damage events to components of the drive

Publication Date: 2019.02.26 INTERNATIONAL BUSINESS MACHINE CORPORATION

AI summary

In one embodiment, a computer-implemented method includes determining whether a medium in a drive is in motion, the drive being mounted in a receptacle. In response to determining that the medium is in motion, physical removal of the drive from the receptacle is prevented. In another embodiment, a computer program product for controlling removal of a drive includes a computer readable storage medium having program instructions embodied therewith. The computer readable storage medium is not a transitory signal per se. The program instructions are readable and/or executable by a computer to cause the computer to perform the foregoing method.