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NAND flash memory equipment and data recovery method thereof

A technology of flash memory storage and recovery method, which is applied in the direction of electrical digital data processing, generation of response errors, instruments, etc., can solve problems such as partial data recovery, and achieve the effect of improving reliability

Active Publication Date: 2013-10-23
深圳市领存技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a NAND flash memory storage device and its data recovery method, aiming to solve the problem that some data cannot be recovered by traditional error detection / error correction methods

Method used

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  • NAND flash memory equipment and data recovery method thereof
  • NAND flash memory equipment and data recovery method thereof
  • NAND flash memory equipment and data recovery method thereof

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Embodiment Construction

[0026] 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 and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] According to the structure of a NAND flash storage device according to the present invention, when the data of one or more channels is completely damaged, the data of one or more channels can be recovered by using the XOR check algorithm between the channels . NAND flash storage devices also have error detection / error correction, XOR algorithm double verification mechanism between channels, greatly improving data reliability.

[0028] Such as figure 1 , image 3 Shown, a kind of data recovery method of NAND flash storage device, comprises the following steps:

[0029] Step 1: the NAND fl...

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Abstract

The invention is applicable to the technical field of NAND flash memory equipment and provides the NAND flash memory equipment and a data recovery method thereof. The method comprises the following steps: (1) forming a plurality of channels in the NAND flash memory equipment, wherein a plurality of NAND flash memories are arranged in each channel, each channel comprises a data channel and a protection channel, each data channel is used for storing data, each protection channel is used for storing a check code, and the number of the data channels is greater than or equal to that of the protection channels; (2) recovering the data of the data channels by using an error detecting / correcting algorithm; and (3) recovering the data of the data channels by using an inter-channel exclusive OR algorithm when the step (2) fails. The method adopts a conventional error detecting / correcting algorithm and the inter-channel exclusive OR algorithm, so that the reliability of the data can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of NAND flash memory storage devices, and in particular relates to a NAND flash memory storage device and a data recovery method thereof. Background technique [0002] In recent years, with the improvement of storage density and the reduction of cost of NAND flash memory, large-capacity NAND flash memory storage devices are more and more widely used. NAND flash storage devices have many advantages over disk-based storage devices, such as: less power consumption, better resistance to physical shock and electromagnetic compatibility, smaller physical size, and lighter weight. NAND flash memory is widely used in handheld devices, such as: media players, mobile phones, tablet computers, portable music players, etc. In recent years, the application of NAND flash memory has expanded to personal computers, notebook computers, data centers, etc. And with the advancement of semiconductor process feature size and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/10
CPCG06F11/1068
Inventor 楚一兵
Owner 深圳市领存技术有限公司