Solid state disc and power failure protection method and system thereof

Abstract

The invention is applied to the fields of solid state discs and information storage and provides a solid state disc and a power failure protection method and a system thereof. The method comprises the steps of performing self-adaption data backup computation and judging whether to proceed data backup when data is written into the solid state disc; if backup is required, backuping the data to a single level cell (SLC) type storage area converted from a multi level cell (MLC) type storage area, then writing the data into the MLC type storage area, otherwise directly writing the data into the MLC type storage area; and when the solid state disc is powered on, the data is recovered according to data backup information. Therefore, the solid state disc and the power failure protection method and the system of the solid state disc can solve the problem of data damage of coupling pages in Nand Flash caused by abnormal power failure by means of a self-adaption backup technology on the basis that hardware design cost and complexity are not increased.

Description

technical field [0001] The invention relates to the fields of solid-state hard drives and information storage, in particular to a solid-state hard drive and a power-down protection method and system thereof. Background technique [0002] The Nand Flash chips used in existing solid-state drives are mainly MLC (Multi-Level Cell, multi-layer unit) Nand Flash chips, and for most MLC Nand Flash chips, there are two notable characteristics: 1. In the same unit The two bits of are allocated in two different pages, so the two pages are strongly coupled, if the high-order page is destroyed, the data in the low-order page will also be destroyed. 2. MLC type Nand Flash can be converted into SLC (Single Layer Cell, single layer unit) type Nand Flash through special technology and software management technology. [0003] At present, SSDs use multiple Nand Flash controllers as multiple channels in parallel to achieve high data throughput, and there are a large number of Nand Flash read a...

AI Technical Summary

Problems solved by technology

[0007] For above-mentioned defect, the object of the present invention is to provide a kind of solid-state hard disk and its power-down protection method, system, it can not increase hardware design cost and complexity on the basis, solves NAND due to abnormal power-down through special-purpose software technology. The problem that the data of the coupling page in Flash is destroyed

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