Server Node Segmentation for Storage Density and Reliability
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Solution Overview
Problem
Existing server designs with centralized controllers for hard disk drives suffer from inefficiencies in space utilization, reliability, and ergonomic concerns due to heavy components and the risk of single-point failures, leading to inadequate computing or storage capacity and safety hazards in data centers.
Innovation Solution
The design breaks down server nodes into sub-node chassis that can be individually installed and removed, allowing for a server device to be integrated with mass storage devices in the same chassis, eliminating unused space and reducing the impact of single component failures by creating independent logical nodes, thus increasing storage density and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If standard off-the-shelf hard disk drives are used in server designs, then cost effectiveness is improved, but space utilization deteriorates due to substantial wasted space in server chassis
Solution Approach 1:
The server system is divided into multiple independent server nodes, each containing its own controller and hard disk drives. This segmentation allows for more flexible space utilization within each node while maintaining cost-effectiveness through standardized components. The chassis is also segmented to accommodate multiple nodes efficiently, reducing wasted space compared to centralized designs.
2Device complexity
If a centralized controller is used to control accesses to hard disk drives, then device complexity is reduced, but reliability deteriorates because a controller failure causes all hard disk drives to be unreachable
Solution Approach 1:
The centralized controller is segmented into multiple distributed controllers, each responsible for controlling accesses to hard disk drives within its own server node. This segmentation eliminates the single-point-of-failure problem because a failure in one controller only affects its local node, not the entire system. Each node operates independently, maintaining system reliability while managing complexity through modular architecture.
3Quantity of substance
If a large number of hard disk drives are mounted on a common chassis to increase storage capacity, then storage density is improved, but weight increases making servers heavy and creating ergonomic risks
Solution Approach 1:
The large number of hard disk drives are segmented across multiple server nodes distributed throughout the chassis rather than concentrated in a single heavy unit. Each node contains a subset of drives and its own controller, creating modular units that are lighter and easier to handle. This segmentation maintains total storage capacity while reducing the weight of individual components, eliminating ergonomic risks during installation and maintenance.
4Ease of operation
If server nodes are broken into segments mounted in separate sub-node chassis, then ease of operation is improved for installation and removal, but device complexity increases due to multiple connectors and interfaces
Solution Approach 1:
Server nodes are nested within the main server system, with each node containing its own controller and hard disk drives housed in sub-node chassis. This nested structure allows individual nodes to be independently installed, removed, or replaced without affecting other nodes, greatly improving ease of operation. The modular design encapsulates complexity within each node while presenting a simple interface at the system level.
Data Source
AI summary
A system includes a rack and one or more server systems mounted in the rack. A server system includes at least one sever node and each server node includes an array of devices including mass storage devices and at least one server device. Segments of the array of devices of a particular server node are mounted in sub-node chassis that include intra node connectors. Multiple sub-node chassis that each include devices such as mass storage devices or server devices of the sever node couple together via the intra node connectors when installed in a server system chassis to form a server node. Each server node of a server system may be a separate logical node. Also, the sub-node chassis of a server node may be configured for vertical airflow through the sub-node chassis in addition to cross airflow.