Sidewall-Accessible Dense Storage Rack With Fixed System Board
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Solution Overview
Problem
Current storage solutions for high-density hard disk drives (HDDs) face challenges in balancing device density, cooling requirements, and serviceability, often requiring complex mechanical systems that increase costs and reduce density, or they allow non-hot-pluggable drives that lead to larger fault domains and downtime during maintenance.
Innovation Solution
A device rack design with a fixed system board and high connector density within the rack frame, devoid of sliding rails and cable management arms, utilizing a plenum for airflow and robotic servicing to enable hot-pluggable HDDs with increased accessibility and reduced operational and capital expenditures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sliding rails and hinged cable management arms are used to access components, then component serviceability is improved, but device density and structural complexity are reduced
Solution Approach 1:
The patent removes sliding rails and hinged cable management arms from the rack structure, extracting these complex mechanical components entirely. Instead, components are accessed by sliding them horizontally on fixed rails that are integral to the component assemblies themselves, not the rack structure. This extraction principle resolves the contradiction by eliminating the source of structural complexity while preserving serviceability through the simplified access mechanism.
Solution Approach 2:
Rather than having the rack structure provide sliding rails and cable management (traditional approach), the invention inverts the approach by making the component assemblies themselves contain the sliding capability and cable management features. This inversion transfers the complexity from the rack structure to the individual component level, achieving high device density in the rack while maintaining ease of operation.
2Ease of operation
If sliding rails are used to move components outside the rack, then component accessibility is improved, but device density is reduced
Solution Approach 1:
The patent changes the dimension of component movement from vertical (sliding rails extending outward from the rack) to horizontal (sliding components along the rack width). Components slide horizontally on fixed rails to access positions at the rack's front opening, then return horizontally to their storage positions. This dimensional change allows high device density in the vertical rack space while maintaining accessibility through horizontal movement.
3Ease of operation
If hinged cable management arms are used to maintain connectivity during component movement, then serviceability is improved, but device complexity and overhead costs increase
Solution Approach 1:
The patent extracts hinged cable management arms from the system entirely. Instead, cables are routed through fixed channels in the rack structure, and components maintain connectivity through their own integrated cable connections that remain stationary relative to the rack. This extraction eliminates the complex hinged mechanisms while preserving serviceability through the fixed cable routing approach.
4Ease of operation
If components are mounted on sliding rails that move outside the rack, then accessibility is improved, but cooling efficiency and device density are reduced
Solution Approach 1:
Rather than moving components outside the rack on sliding rails (traditional approach), the invention inverts the approach by keeping components within the rack structure and providing access through horizontal sliding to front-facing positions. This inversion ensures components remain within the controlled cooling environment of the rack while maintaining accessibility, resolving the contradiction between accessibility and cooling efficiency.
Data Source
AI summary
Rack configurations provide increased storage device density without compromising cooling or immediate device availability. A device rack has a frame including posts which define an interior containing system board(s) with electronic device connectors. The system board is fixed relative to the frame, and the rack is devoid of sliding rails and cable management arms for the devices, thereby reducing rack weight and mechanical complexity. A vertical plenum within the rack between loaded system boards carries cooling air for the devices and may also permit use of a service robot to install or replace hot-pluggable hard disk drives or other devices, which can be arranged in columns. As one objective measure of the increased density provided, a connector density is at least a specified number of hundreds of mechanically and electronically releasably connectable electronic device connectors per cubic meter within the rack.