CN109947374B

CN109947374B - Redundancy backup protection method for write errors in flash memory master control module

Info

Publication number: CN109947374B
Application number: CN201910256477.9A
Authority: CN
Inventors: 陈育鸣; 李庭育; 魏智汎; 洪振洲
Original assignee: Jiangsu Huacun Electronic Technology Co Ltd
Current assignee: Jiangsu Huacun Electronic Technology Co Ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2022-07-22
Anticipated expiration: 2039-04-01
Also published as: WO2020199488A1; CN109947374A

Abstract

The invention discloses a redundancy backup protection method for write errors in a flash memory main control module, which comprises the following steps: step one, configuring a redundancy backup manager in a flash memory main control module; step two, when the flash memory master control module writes page data, the redundancy backup manager calculates a plurality of written page data sets in real time and keeps the calculation result; step three, if the write-in instruction fails, the redundancy backup manager recalculates the page data written into the flash memory and the operation result of the step two to obtain the page data to be written which generates errors; and fourthly, the flash memory main control module re-initiates a writing instruction to the page data with the error, and writes the error page and the subsequent page. The invention provides a redundancy backup protection method for write errors in a flash memory main control module, which is used for configuring a redundancy backup manager, effectively saving write error processing time and improving the write efficiency of the flash memory main control module.

Description

Redundancy backup protection method for write errors in flash memory master control module

Technical Field

The present invention relates to a storage technology, and in particular, to a redundancy backup protection method for write errors in a flash memory master control module.

Background

Flash memory is a non-volatile memory device that consists of blocks, each block being divided into a plurality of pages, each page having a plurality of columns combined.

As shown in fig. 3, when the conventional flash memory host device issues a read or write command operation, if a flash memory page write error occurs, the host fails to write data into one page and fails to write the entire write command, and at this time, the host needs to retry all the write commands and processes, and the host restarts the entire file write command and process, which wastes a lot of processing time and seriously affects the overall host operation performance.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a redundancy backup protection method for write errors in a flash memory main control module.

In order to achieve the purpose, the invention provides the following technical scheme: a redundancy backup protection method for write errors in a flash memory master control module comprises the following steps:

step one, configuring a redundancy backup manager in a flash memory master control module, and respectively connecting with a flash memory page data control register and a flash memory interface controller in the flash memory master control module;

step two, when the flash memory main control module writes page data, the redundancy backup manager performs operation on a plurality of written page data sets in real time and keeps operation results;

step three, if the write-in instruction fails, the redundancy backup manager recalculates the page data written into the flash memory and the operation result of the step two to obtain the page data to be written which generates errors;

step four: the flash memory main control module re-initiates a write-in instruction to the page data which generates the error, and writes in the error page and the subsequent pages.

Preferably, in the first step, a flash memory control physical layer and a plurality of flash memory storage components are further provided in the flash memory master control module, the flash memory control physical layer is connected to the flash memory interface controller, and the plurality of flash memory storage components are connected to the flash memory control physical layer.

Preferably, in the second step, the redundancy backup manager performs an exclusive or operation on the written page data sets.

Preferably, the recalculating in the third step is as follows: reading out the written page data again, and performing an exclusive-OR operation with the operation result of the second step in the redundancy backup manager to obtain the result as the page data with write error.

Compared with the prior art, the redundancy backup protection method for write errors in the flash memory main control module disclosed by the invention has the following beneficial effects: and configuring a redundancy backup manager, calculating the write-in page data in real time, and calculating the error page data after a write-in error occurs, so that the main control module can rewrite the calculated error page data without feeding back to the host to restart a complete write instruction, thereby greatly saving the processing time of the write instruction error at the flash memory end and effectively improving the write-in energy efficiency of the main control module.

Drawings

FIG. 1 is a block diagram of a memory master module in the prior art;

FIG. 2 is a block diagram of a memory master control module according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a write process of a memory master module in the prior art;

FIG. 4 is a schematic diagram of a write process under redundancy protection according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of step two in an embodiment of the present invention;

FIG. 6 is a schematic diagram of step three in an embodiment of the present invention;

FIG. 7 is a schematic representation of step four in an embodiment of the present invention;

FIG. 8 is a schematic diagram of step five in an embodiment of the present invention.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the present invention.

As shown in fig. 2, the redundancy backup protection method for write errors in a flash memory master control module disclosed by the present invention is implemented based on a flash memory master control module, the flash memory master control module comprises a master control chip and a plurality of flash memory storage components, the master control chip comprises a flash memory storage control module and a flash memory control physical layer, the flash memory storage control module is connected with the plurality of flash memory storage components through the flash memory control physical layer to implement data write, the flash memory storage control module is respectively provided with a flash memory page data control register redundancy backup manager and a flash memory interface controller, wherein the redundancy backup manager is respectively connected with the flash memory page data control register and the flash memory interface controller, compared with the existing flash memory master control module (as shown in fig. 1), the flash memory master control module designed by the present invention is provided with a redundancy backup manager in many ways, and can perform xor operation on the written page data, meanwhile, when the write-in error occurs, the calculation is performed to obtain the write-in error page data.

As shown in fig. 4, the redundancy backup protection method for write errors in a flash memory master control module disclosed by the present invention specifically includes the following steps:

step one, a host end sends a write-in command to a flash memory main control module, and the flash memory main control module starts a write-in action;

step two, when the flash memory main control module writes page data, the redundancy back-up manager performs XOR operation on each page data in a plurality of written page data sets in real time and keeps an operation result;

if the write-in instruction fails, the redundancy backup manager performs exclusive OR operation on the page data written into the flash memory and the operation result of the step two to obtain page data to be written with errors;

step four: the flash memory main control module re-initiates a write-in instruction to the page data generating the error, and directly writes in the error page and the subsequent page;

step five: setting five pages of data as a group, clearing the content in the redundant backup manager after each group of page data is written, and restarting the calculation when the next group is written.

The invention is provided with the redundancy backup manager, the written page data is operated in real time, and the error page data is calculated after the written error occurs, so that the main control module can write again according to the calculated error page data without feeding back to the host to reinitiate the complete write command, thereby greatly saving the processing time of the written command error at the flash memory end and effectively improving the written energy efficiency of the main control module.

Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.

Claims

1. A redundancy backup protection method for write errors in a flash memory master control module is characterized by comprising the following steps:

step four: the flash memory main control module re-initiates a write-in instruction to the page data generating the error, and writes in the error page and the subsequent pages.

2. The redundancy backup protection method for write errors in a flash memory master control module according to claim 1, wherein: in the first step, the flash memory master control module is also internally provided with a flash memory control physical layer and a plurality of flash memory storage components, the flash memory control physical layer is connected with the flash memory interface controller, and the plurality of flash memory storage components are connected with the flash memory control physical layer.