Hot-Plug Cable Assemblies for Modular Data Storage Chassis
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Solution Overview
Problem
High-density data storage systems face challenges in achieving individual serviceability of each disk drive within a enclosure without affecting operational drives, as removing a carrier to access a failing drive often takes companion drives offline.
Innovation Solution
The implementation of cable assemblies that allow for 'hot plugging' of power and data signals to modular data storage chassis, enabling concurrent electrical and data signal connections when the chassis slides into a compartment, facilitating individual serviceability while maintaining system operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple disk drives are mounted on a single carrier to increase storage density, then data storage density is improved, but individual serviceability of each disk drive deteriorates because removing the carrier to access a failing drive also removes companion drives from service
Solution Approach 1:
The patent divides the traditional single-carrier multi-drive configuration into separate individual drive modules. Each disk drive is mounted on its own独立的 carrier or tray that can be individually removed from the rack without affecting other drives. This segmentation enables service personnel to access and replace a single failing drive while companion drives remain mounted and operational, thus resolving the contradiction between high storage density and individual serviceability.
Solution Approach 2:
The patent implements dynamic hot-plug capability that allows disk drives to be added or removed from the rack while the system remains operational. The electrical connectors are designed to maintain contact during the insertion/removal process, and the system firmware dynamically reconfigures storage arrays to accommodate changing drive configurations. This dynamic approach enables individual drive serviceability without requiring system shutdown or affecting companion drives.
2Device complexity
If traditional cable connections are used that require manual plugging and unplugging, then device complexity is reduced, but productivity deteriorates because service personnel must manually connect and disconnect cables during drive installation and removal
Solution Approach 1:
The patent merges the electrical connection function with the mechanical mounting structure by integrating electrical contacts directly into the drive carrier and rack interface. This unified design eliminates separate manual cable plugging and unplugging operations - the electrical connection is automatically established or disconnected as the drive is mechanically inserted or removed from the rack, thereby improving maintenance efficiency without significantly increasing overall device complexity.
Solution Approach 2:
The patent implements self-service electrical connection through spring-loaded contacts and elastic deformation mechanisms that automatically make or break electrical connections based on the physical presence or absence of the drive. The elastic element deforms to establish contact when the drive is inserted and releases to break contact when removed, eliminating the need for manual cable handling and enabling rapid drive replacement by service personnel.
Data Source
AI summary
A chassis housing disk drives has an electrical plug and an electrical signal connector at its back end. A rack has a compartment for receiving the chassis. A cable conduit mounted to a rack sidewall adjacent the compartment abuts the back end of the chassis. A first cable assembly coupled to the cable conduit includes an electrical plug receptacle and a first cable extending through the cable conduit for conducting power to the electrical plug receptacle. A second cable assembly coupled to the cable conduit includes a data signal connector and a second cable extending through the cable conduit for conducting data signals to and from the data signal connector. The electrical plug receptacle receives the electrical plug and the data signal connector receives the electrical signal connector of the chassis, concurrently, when the chassis slides into the compartment fully, to supply power to and establish communications with the chassis.