Controller Descriptor ID Management for Storage Error Handling
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Solution Overview
Problem
Current data storage devices lack efficient management of descriptors, leading to suboptimal operation speeds and error handling in processing and deallocating memory resources.
Innovation Solution
A controller and data storage device with a descriptor identifier management block that allocates and deallocates descriptor IDs based on processing states, enabling effective error handling and memory management through a control unit and memory interface unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If descriptor IDs are not systematically managed, then device complexity is reduced, but operation speed deteriorates due to inefficient memory resource processing
Solution Approach 1:
The patent segments descriptor management into distinct functional blocks: a descriptor ID management block that handles ID allocation and deallocation, a control unit that generates descriptors, and an I/O unit that processes work. This segmentation allows each block to specialize in specific tasks, improving operation speed while maintaining manageable complexity through clear functional boundaries.
Solution Approach 2:
The descriptor ID management block pre-allocates descriptor IDs and maintains a mapping between descriptor IDs and physical memory addresses before actual data processing occurs. This preliminary action eliminates the need for complex runtime memory management calculations, thereby improving operation speed without significantly increasing device complexity.
2Reliability
If error handling is implemented for abnormal work processing, then reliability is improved, but loss of time increases due to additional error processing steps
Solution Approach 1:
The I/O unit provides feedback to the descriptor ID management block about the completion status of work processing. When work is completed abnormally, the I/O unit triggers an error handling routine that automatically deallocates the descriptor ID through the descriptor ID management block. This feedback mechanism ensures reliable error handling while minimizing time loss by automating the deallocation process rather than requiring manual intervention.
Solution Approach 2:
The system implements self-service error handling where the I/O unit automatically detects abnormal work completion and initiates the deallocation of descriptor IDs without external intervention. The control unit and descriptor ID management block work together to automatically clean up resources, improving reliability while reducing the time penalty associated with error processing.
3Productivity
If descriptor IDs are deallocated immediately after normal work completion, then productivity is improved, but loss of time increases due to frequent allocation and deallocation operations
Solution Approach 1:
The descriptor ID management block maintains a pool of pre-allocated descriptor IDs and a mapping structure that associates descriptor IDs with physical memory addresses and work status. When work is completed normally, the I/O unit requests deallocation, and the descriptor ID management block efficiently reclaims the ID from the active pool. This preliminary organization of ID management structures reduces the time overhead of allocation and deallocation operations while maintaining high productivity.
Data Source
AI summary
A controller includes a descriptor identifier (ID) management block suitable for allocating or deallocating a descriptor ID; a control unit suitable for generating a descriptor corresponding to the descriptor ID, which is allocated by the descriptor ID management block; and an input/output unit suitable for processing a work based on the descriptor, wherein the input/output unit transfers a request for deallocating the descriptor ID to the descriptor ID management block when the work is normally processed.