RAID Circuit Buffering for Byte-Level Access Without Parity Loss
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Solution Overview
Problem
Existing RAID configurations do not support byte-level access to data, which can result in data corruption or loss due to improper handling of parity checks and error detection, especially when using different protocols for accessing data.
Innovation Solution
A RAID engine that combines the address ranges of individual storage devices, using a buffer to manage data integrity and parity, enabling both block and byte-level access while maintaining RAID configuration integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If byte-level access is implemented in RAID configurations, then data access flexibility and speed are improved, but data integrity and reliability deteriorate due to potential data corruption when bypassing traditional RAID controllers
Solution Approach 1:
The patent introduces a RAID circuit as an intermediary component that sits between the storage devices and the byte-level access interface. This circuit intercepts byte-level requests, translates them into appropriate block-level operations, and manages parity calculations automatically, thereby maintaining data integrity while enabling fast byte-level access without requiring a traditional RAID controller in the critical path.
Solution Approach 2:
The patent segments the RAID functionality into two parts: a RAID circuit that handles parity management and data translation in hardware, and a buffer that stores data blocks. This segmentation allows byte-level access to the buffer while the RAID circuit ensures that all modifications maintain proper RAID parity, thus preserving reliability while improving access speed.
2Adaptability or versatility
If byte-level protocols are used to access RAID data, then access granularity and flexibility are improved, but data accuracy deteriorates due to potential data corruption
Solution Approach 1:
The RAID circuit acts as an intermediary that monitors and manages all byte-level access operations. It translates fine-grained byte-level requests into safe block-level operations and automatically updates parity information, thereby maintaining data accuracy while providing the flexibility and granularity of byte-level protocols.
Solution Approach 2:
The patent implements feedback mechanisms where the RAID circuit continuously monitors buffer modifications and automatically triggers parity recalculation and updates. This feedback loop ensures that data accuracy is maintained by detecting and correcting any potential corruption from byte-level operations.
3Reliability
If traditional RAID controllers are used for data access, then data integrity is maintained through parity checks, but access speed and efficiency deteriorate
Solution Approach 1:
The patent replaces the mechanical/software-based RAID controller with a hardware RAID circuit that performs parity calculations and data management in parallel with data access operations. This substitution eliminates the sequential bottleneck of traditional controllers while maintaining integrity through hardware-enforced parity management.
Solution Approach 2:
The patent pre-loads data blocks into a buffer before they are needed for byte-level access. The RAID circuit prepares and validates data in advance, so that when byte-level access requests arrive, the data is already ready in the buffer, eliminating the need for slow controller-mediated access while maintaining integrity.
4Productivity
If byte-level access bypasses RAID technology, then access efficiency is improved, but data reliability deteriorates due to lack of parity protection
Solution Approach 1:
The RAID circuit serves as an intermediary that enables efficient byte-level access to the buffer while simultaneously providing parity protection. It intercepts access requests, manages the buffer contents, and ensures that all modifications maintain proper RAID parity, thus achieving both high productivity and reliability.
Solution Approach 2:
The patent implements self-service mechanisms where the RAID circuit automatically manages parity calculations and buffer updates without requiring external controller intervention. This allows byte-level access to proceed efficiently while the RAID circuit autonomously maintains data reliability through parity protection.
Data Source
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AI summary
A system is disclosed. A first storage device may supporting a cache coherent interconnect protocol, the cache coherent interconnect protocol including a block level protocol and a byte level protocol. A second storage device may also support the cache coherent interconnect protocol. A redundant array of independent disks (RAID) circuit may communicate with the first storage device and the second storage device. The RAID circuit may apply a RAID level to the first storage device and the second storage device. The RAID circuit may be configured to receive a request using the byte level protocol and to access data on the first storage device.