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Access control method for data storage

An access control and data storage technology, applied in the direction of memory address/allocation/relocation, input/output to the record carrier, etc., can solve the problem of low reliability, insufficient original information redundancy bits to store data, etc., to save Effect of time required for read and write access

Active Publication Date: 2013-03-20
XIAMEN IND TECH RES INST CO LTD
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Problems solved by technology

[0008] However, for some NAND FLASH with relatively low reliability or higher requirements for data reliability, more redundant bits are needed to achieve the corresponding reliability requirements. In this case, NAND FLASH Each page is not enough to store the original information and all redundant bits of the data of a page

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Embodiment Construction

[0030] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments.

[0031] In such Figure 1a with Figure 1b In the first embodiment shown, the storage architecture includes at least two NAND FLASH packages 1~n (n in the first embodiment is a positive integer greater than or equal to 2), and each NAND FLASH package is divided into a data storage area And a redundant storage area; and, the access control method for data storage in the first embodiment includes:

[0032] When performing write operations on the above storage architecture, see Figure 1a , Write the original information of the data to the data storage area in one of the NANDFLASH packages i (i in the first embodiment is a positive integer greater than or equal to 1 and less than or equal to n), and at the same time, the redundant bits of the data are writ...

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Abstract

The invention discloses an access control method for data storage, wherein a data storage area and a redundancy storage area are divided in each package or each storage unit or each BANK; therefore, the original information and the redundancy bits of data are stored in the corresponding data storage areas and the corresponding redundancy storage areas respectively in a distributive storage way, without necessity of centralized storage in one page; in such a way, enough storage space can be provided for the storage of the original information and the redundancy bits of the data; moreover, with the adoption of the access control method for the data storage, the data storage areas and the redundancy storage areas respectively corresponding to the original information and the redundancy bit of the same datum are located in the various packages or the various storage units or the various BANKs; therefore, the reading-writing access to the same datum can be realized through the synchronous reading-writing of the various packages, or the various storage units, or the various BANKs; and finally, the required time for the reading-writing access can be saved, so that no decrease of storage performance resulting from the distributive storage can be guaranteed.

Description

Technical field [0001] The present invention relates to data storage technology, in particular to an access control method for data storage. Background technique [0002] In the prior art, SSD (Solid State Disk) data storage systems based on NAND FLASH (and non-flash memory) benefit from high throughput, low power consumption, shock resistance, high stability, low temperature resistance, low heat generation, Many advantages, such as low working noise, have broad application prospects in the fields of enterprise high-performance computers, military and industrial, personal computers, ultra-low-cost personal computers, and corporate computers. [0003] However, with the shrinking of the NAND FLASH process size and the application of MLC (Multi-Level Cell) technology, NAND FLASH has serious reliability problems. Therefore, the prior art usually adopts error correction code technology to solve the reliability problem of NAND FLASH data storage. Error correction code technology is mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/06G06F3/06
Inventor 潘立阳麻昊志邹宏飞
Owner XIAMEN IND TECH RES INST CO LTD