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Data reconstruction method and system, and memory control circuit unit

A data reconstruction and control circuit technology, applied in the field of data reconstruction, can solve problems such as damage to physical erasing units and inability to access memory data normally

Active Publication Date: 2017-05-24
PHISON ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the memory storage device has been used for a period of time, the physical erasing unit in the rewritable non-volatile memory module may be damaged due to human factors or other reasons.
If the damaged physical erasing unit just stores the logical-physical mapping table, it will lead to the situation that the data in the memory storage device cannot be accessed normally

Method used

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  • Data reconstruction method and system, and memory control circuit unit
  • Data reconstruction method and system, and memory control circuit unit
  • Data reconstruction method and system, and memory control circuit unit

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Embodiment Construction

[0101] Generally speaking, a memory storage device (also called a memory storage system) includes a rewritable non-volatile memory module and a controller (also called a control circuit unit). Typically memory storage devices are used with a host system such that the host system can write data to or read data from the memory storage device.

[0102] figure 1 is a schematic diagram of a host system, a memory storage device, and an input / output (I / O) device according to an embodiment, and figure 2 is a schematic diagram of a host system, a memory storage device, and an input / output (I / O) device according to another embodiment.

[0103] Please refer to figure 1 and figure 2 , the host system 11 generally includes a processor 111 , a random access memory (random access memory, RAM for short) 112 , a read only memory (ROM for short) 113 and a data transmission interface 114 . The processor 111 , random access memory 112 , ROM 113 and data transmission interface 114 are all el...

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Abstract

The invention provides a data reconstruction method and system, and a memory control circuit unit. The method comprises the steps of reading entity-logic mapping information in a rewritable nonvolatile memory module and time information corresponding to the entity-logic mapping information; sorting the entity-logic mapping information according to the time information corresponding to the entity-logic mapping information; and reconstructing a logic-entity mapping table according to the sorted entity-logic mapping information, and restoring the reconstructed logic-entity mapping table in a buffer memory. When the logic-entity mapping table is disrupted due to damage of the rewritable nonvolatile memory module, the logic-entity mapping table can be reconstructed according to the existing entity-logic mapping information, so that data stored in the rewritable nonvolatile memory module is identified.

Description

technical field [0001] The present invention relates to a data rebuilding method, and in particular to a data rebuilding method and system of a rebuildable mapping table and a memory control circuit unit thereof. Background technique [0002] Digital cameras, mobile phones, and MP3 players have grown rapidly in recent years, making consumers' demand for storage media also increase rapidly. Since the rewritable non-volatile memory module (for example, flash memory) has the characteristics of data non-volatility, power saving, small size, and no mechanical structure, it is very suitable for being built in the various memory modules listed above. in portable multimedia devices. [0003] In order to perform data access, a memory storage device using a rewritable non-volatile memory module as a storage medium records the mapping relationship between logical addresses and physical addresses in a logical-physical mapping table. Generally speaking, when data is written into the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0614G06F3/062
Inventor 王声翰
Owner PHISON ELECTRONICS
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