Automated Data Storage Library Holding Receptacle and Sub-Library Segmentation
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Solution Overview
Problem
Automated data storage libraries face inefficiencies due to queueing and backlogging of commands, as robots and drives are often unable to immediately execute host computer commands, leading to delays in tape cartridge movement and data operations.
Innovation Solution
The introduction of a holding receptacle within the library system to temporarily store tape cartridges during operations, allowing robots to move them more efficiently between storage locations and drives, and the use of sub-libraries connected via a transport bridge to balance storage operations and reduce travel distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the library robot moves tape cartridges directly between storage locations and drives, then the system structure remains simple, but command queuing and backlogging occur due to inability to immediately execute commands
Solution Approach 1:
The holding receptacle allows the robot to preliminarily place tape cartridges in intermediate positions before drive operations are complete. This preliminary action enables the robot to immediately execute subsequent commands without waiting for drive operations to finish, eliminating command queuing and backlogging while maintaining simple system structure.
2Quantity of substance
If tape cartridges are stored in distant storage locations, then storage capacity is maximized, but robot travel time and distance increase
Solution Approach 1:
The holding receptacle serves as an intermediary between distant storage locations and the drive. The robot can quickly deposit cartridges into the holding receptacle during travel to the drive, and the system can retrieve them as needed, effectively decoupling storage capacity from access speed and allowing maximized storage without compromising robot movement efficiency.
3Productivity
If multiple sub-libraries are connected via transport bridge, then storage operations are balanced and travel distances reduced, but device complexity increases
Solution Approach 1:
The library system is segmented into multiple sub-libraries connected via transport bridge, with each sub-library containing its own holding receptacle. This segmentation allows independent operation and balancing of storage operations across sub-libraries, reducing overall travel distances and improving productivity while distributing complexity across modular units rather than creating a single complex centralized system.
Data Source
AI summary
Described are systems for and methods of improving the efficiency of an automated data storage library.