Storage system with performance life evaluation based on SD card and storage method thereof

A storage system and life evaluation technology, which is applied in the memory system, memory architecture access/allocation, memory address/allocation/relocation, etc. It can solve the problems of data loss, small buffer size, and users unable to obtain SD card status in time. Achieving the effect of fast storage speed, uniform writing, and improved storage speed

Active Publication Date: 2019-11-29
JILIN UNIV
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Problems solved by technology

[0005] The important thing is that the current ground-air electromagnetic detection embedded receiving system has a small buffer and no SD card life evaluation function. Once the SD card encounters too many damaged sec

Method used

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  • Storage system with performance life evaluation based on SD card and storage method thereof
  • Storage system with performance life evaluation based on SD card and storage method thereof
  • Storage system with performance life evaluation based on SD card and storage method thereof

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] As a storage medium, SD card is widely used in mobile portable devices. The storage area of ​​the SD card contains a lot of physical sectors. The present invention mainly starts with the limited number of write times of Nandflash (flash memory), and writes the data into the index mode to drive the SD card to read and write operations by sending commands, so as to realize the uniform writing of the physical sectors. Add and remove seek time, improve storage speed, and evaluate SD card performance by getting the number of unusable sectors.

[0029] Nandflash can be divided into: SLC (single-level storage unit), MLC (double-layer storage unit), TLC (three-level storage unit) and QLC (four-layer storage unit) according to the density of the electronic unit. Dif...

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Abstract

The invention relates to a storage system with performance life evaluation based on an SD card. The storage system is characterized in that a core control module of the storage system receives data sent by external equipment and drives the SD card to read and write the data; and during storage of data, the core control module skips to the functional index area according to the functional index area head address of the guide area to obtain the head addresses of the sector shielding area, the data writing index area and the data storage area, obtains last data writing head and tail addresses according to the content of the data writing index area, adds 1 to the tail address to serve as the head address of the current data writing, writes the data into the data storage area, and skips to theaddress of a damaged or performance-substandard sector when the data is written while adding 1 to the number of complete writing times of the SD card every time the data is completely written into theSD card. The storage system can evaluate the physical sector performance of the SD card, can shield damaged sectors with low performance to improve the storage speed, and meanwhile, can obtain the state of the SD card according to the number of times of complete writing, so as to guarantee safe and reliable storage of data.

Description

Technical field: [0001] The invention belongs to the technical field of data storage, and in particular relates to an SD card-based storage system with performance life evaluation and a storage method thereof, which use an SD card as a storage medium. Background technique: [0002] SD memory card (Secure Digital Card) is a new generation memory device based on semiconductor flash memory. It has the characteristics of small size, large capacity and fast data transmission speed, and is widely used in portable devices. [0003] Flash memory, referred to as flash memory, is a form of electronic erasable programmable read-only memory. According to the density of electronic units in flash memory, it can be divided into: SLC (single-level storage unit), MLC (double-layer storage unit), TLC (three-level storage unit) and QLC (four-layer storage unit), from SLC to QLC, cost reduction, The capacity increases but the speed becomes slower and the life span is reduced. At this stage, t...

Claims

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Application Information

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IPC IPC(8): G06F11/30G06F3/06G06F12/02
CPCG06F3/0604G06F3/0616G06F3/0679G06F11/3037G06F11/3055G06F12/0246G06F2212/7211
Inventor 于生宝张嘉霖王世隆魏一鸣
Owner JILIN UNIV
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