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Redundancy method applied to flash memory storage device and flash memory storage device

A technology of flash memory storage and cache storage, which is applied in the field of storage devices, can solve problems such as loss, and achieve the effect of reducing costs and reducing usage

Pending Publication Date: 2020-05-08
RAYMX MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when the SRAM capacity of the flash storage device is fixed, it loses the ability to support more pages to do data calculations

Method used

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  • Redundancy method applied to flash memory storage device and flash memory storage device
  • Redundancy method applied to flash memory storage device and flash memory storage device
  • Redundancy method applied to flash memory storage device and flash memory storage device

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Embodiment Construction

[0016] Embodiments of the present invention will be described below in conjunction with related drawings. In these drawings, the same reference numerals represent the same or similar components or method flows.

[0017] It must be understood that words such as "comprising" and "comprising" used in this specification are used to indicate the existence of specific technical features, values, method steps, job processing, components and / or components, but do not exclude possible Plus more technical features, values, method steps, job processes, components, components, or any combination of the above.

[0018] Words such as "first", "second", and "third" used in the present invention are used to modify the components in the claims, and are not used to indicate that there is a priority order, a prior relationship between them, or that a component is prior relative to another component, or the chronological order in which method steps are performed, is only used to distinguish comp...

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PUM

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Abstract

The invention relates to a redundancy method applied to a flash memory storage device, the flash memory storage device is provided with at least one storage area and a temporary storage area for redundancy operation, and the redundancy method comprises the following steps: in a cache, performing redundancy operation on a first group of pages stored in one of a plurality of storage areas to generate a redundancy operation intermediate result; storing the redundant operation intermediate result in a storage area of the at least one temporary storage area for redundant calculation by the cache; in the cache, performing redundancy operation on the operation result of the (M + 1) th group of pages stored in one of the plurality of storage areas and the operation result of the first group of pages stored in the at least one temporary storage area for redundancy operation to generate a final result of the redundancy operation; and storing the final result of the redundant operation from the cache to the corresponding page in the (M + 1) th group of pages. The use of the memory can be reduced under the condition of considering the data recovery capability, so that the cost for realizing redundant operation is reduced.

Description

technical field [0001] The invention relates to a storage device, in particular to a redundancy method for a flash memory (NAND Flash Memory) of a flash memory storage device and a flash memory storage device. Background technique [0002] Redundant Array of Independent Disks (RAID), formerly known as Redundant Array of Inexpensive Disks (Redundant Array of Inexpensive Disks), referred to as disk array, is a disk array with redundant storage capabilities, so that data recover. It is widely used in storage fields such as solid-state disk (SSD), USB flash drive (Pen-drive), and SD memory card (Secure Digital Memory Card). The realization of RAID is to generate redundant data through operation of the stored data, and then save both the data and the redundant data. If there is an error in the data, the other data and the redundant data are reversed together to obtain the required data. This process requires a large amount of memory to cache data, which greatly increases the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/0607G06F3/0644G06F3/0689G11C29/846G11C16/0483G06F11/1608G06F3/0688G06F12/0246G06F2212/7203G06F11/2094G06F12/0815G06F2201/82G06F2212/1032G11C2216/14
Inventor 周宇峰陈双喜
Owner RAYMX MICROELECTRONICS CORP