RAID6 Stripe Index Calculation via Parity Block Offset
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Solution Overview
Problem
The conventional method for calculating the stripe location in RAID6 is cumbersome, requiring guesswork and verification, which complicates the process and slows down storage operations.
Innovation Solution
A method and system that calculate the pack offset and address of a parity block, then compare these to determine if it is on a to-be-checked strip, allowing direct calculation of the stripe index considering redundant elements, thereby simplifying the process and improving calculation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the conventional method for calculating stripe location in RAID6 is used, then the calculation can be performed, but the process is cumbersome and slow due to requiring guesswork and verification
Solution Approach 1:
The patent calculates the parity block's strip address in advance using the formula involving disk index and pack offset. By determining the parity block location beforehand and storing it, the system eliminates the need for guesswork and verification during stripe index calculation, directly computing the result through comparison with the pre-calculated parity block address
Solution Approach 2:
The patent extracts the parity block calculation from the general stripe index calculation process. By separately calculating and storing the parity block's strip address independently, the system can then quickly determine whether a given strip address corresponds to a parity block without going through the complex conventional guesswork process
2Productivity
If the conventional method is used, then stripe index can be calculated, but reading and writing efficiency is reduced due to the cumbersome process
Solution Approach 1:
By pre-calculating and storing the parity block's strip address, the system prepares the necessary information in advance. During actual read/write operations, the system only needs to compare the given strip address with the pre-stored parity block address and compute the stripe index directly, significantly reducing calculation time and improving storage operation efficiency
3Productivity
If direct calculation method is used, then calculation speed is improved, but accuracy may be compromised without considering redundant elements
Solution Approach 1:
The patent uses a feedback mechanism by comparing the given strip address with the pre-calculated parity block strip address. Based on this comparison result, the system determines whether to apply the direct calculation formula or to use the formula that accounts for redundant elements caused by parity blocks, ensuring both speed and accuracy
Solution Approach 2:
The patent changes the calculation approach based on the parameter of whether the strip address corresponds to a parity block location. When the addresses match, the system uses a modified formula that accounts for redundant elements; when they don't match, the system uses the direct calculation formula, thus adapting the calculation method to the specific case
Data Source
AI summary
The present application provides a method and a system for calculating a stripe of a strip for a disk, a terminal and a storage medium. The method includes: calculating a pack offset of a parity block according to a given disk index; calculating an address of a strip where the parity block is located in the disk according to the pack offset; comparing an address of a to-be-checked strip with the address of the strip where the parity block is located in the disk to determine whether the parity block is on the to-be-checked strip; and calculating a stripe index of the to-be-checked strip by considering redundant elements caused by the parity block in response to determining that the parity block is on the to-be-checked strip; or calculating the stripe index of the to-be-checked strip directly in response to determining that the parity block is not on the to-be-checked strip.