Storage Device Write Integrity via Check-In Authentication
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Solution Overview
Problem
Current storage devices face challenges in achieving improved write performance and data integrity, particularly in secure write operations and handling sudden power-offs, where data integrity verification and recovery are complex and inefficient.
Innovation Solution
A storage device with a memory controller that generates check-in and check-out information for secure write operations, using authentication codes to verify data integrity and manage write operations, and includes mechanisms for data recovery after power failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If authentication codes and check information are added to verify data integrity, then data reliability is improved, but device complexity increases
Solution Approach 1:
The system performs authentication verification before the actual write operation to the memory device. The memory controller generates check-in information including authentication codes before programming data, and verifies check-out information after the write operation. This preliminary action ensures data integrity is established before writing occurs, resolving the contradiction by preventing corrupted or unauthorized data from being written while maintaining a clear separation of verification and writing functions.
Solution Approach 2:
The write operation is segmented into distinct phases: check-in information generation (including authentication codes), actual data programming to the memory device, and check-out information generation. This segmentation allows the authentication and verification processes to be handled as separate, manageable tasks rather than a single complex operation, reducing the perceived complexity while maintaining reliability.
2Reliability
If check-in and check-out information are generated for every write operation, then data reliability is improved, but write performance deteriorates
Solution Approach 1:
The system implements feedback mechanisms where check-out information is generated and returned to the host device after each write operation. This feedback loop provides confirmation of successful writes and data integrity, allowing the host to verify operations without requiring complex verification procedures. The feedback mechanism improves reliability by ensuring writes are confirmed while maintaining performance through efficient verification protocols.
Solution Approach 2:
The memory controller autonomously generates and manages check-in and check-out information without requiring explicit verification commands from the host. The system self-verifies data integrity by generating authentication codes and checking information automatically during the write process, reducing the overhead of manual verification while maintaining high reliability. This self-service approach eliminates the need for separate verification operations that would slow down write performance.
3Reliability
If authentication verification is performed before write operations, then data reliability is improved, but write time increases
Solution Approach 1:
Authentication verification is performed as a preliminary action before the actual data programming operation. The memory controller generates check-in information including authentication codes and verifies them before writing data to the memory device. This ensures that only authenticated data is written, improving reliability while the preliminary nature of the verification allows for efficient integration with the write operation timeline.
Solution Approach 2:
The authentication verification process is merged with the write operation workflow rather than being a completely separate sequential step. The check-in information generation and authentication occur in conjunction with the write command issuance, and the check-out information is generated as part of the write completion sequence. This merging reduces the total time overhead while maintaining comprehensive authentication verification.
Data Source
AI summary
Provided herein may be a storage device having improved write performance. The storage device may include a memory device and a memory controller. The memory controller may generate check-in information indicating start of a program operation in response to a write request received from the host, control the memory device to perform a program operation of storing data received from the host in a target area of the memory device, generate check-out information indicating whether the program operation has succeeded, and provide a write result response including the check-out information to the host in response to a write return request received from the host.