Solid-state hard disk and method for fast booting based on solid-state hard disk after power failure

Abstract

A solid state disk is used for rapid start-up after power failure and comprises a reading module, a judging module, an updating module, a searching module and a recovering module, wherein the reading module reads a failure physical block from a fixed position and sequentially reads a labeled zone of a physical page in a physical block outside the failure physical block to obtain a logic address; the judging module judges whether the logic address is the same as an initial value of a corresponding logical block in a first order mapping table or not; the updating module updates the address of a physical block in the first order mapping table when the logic address is the same as the initial value of the corresponding logical block in the first order mapping table; the searching module searches the last physical page of each group of physical blocks one by one by means of a binary search method, and the updating module updates information of physical pages in the first order mapping table according to the last physical page of a physical block with a large groove mark number; the recovering module carries out start-up recovery according to the updated first order mapping table and the failure physical block. According to the solid state disk, recovering for the first order mapping table is carried out in a concentrated mode, and efficiency of start-up recovering after the power failure is effectively improved.

Description

technical field [0001] The invention relates to the technical field of computers and electronic information, in particular to a solid-state hard disk and a method for fast booting based on the solid-state hard disk after power failure. Background technique [0002] In a solid-state storage system, the smallest unit for reading and writing of Nand Flash particles is a page, and the smallest unit for erasing is a block. Generally, a block consists of 256 pages. Because of the characteristics of NAND Flash, the NAND Flash Array needs to be managed by FTL (Flash translation layer), so as to realize the transparency of the operation of the application layer and ensure the integrity and correctness of user data under any circumstances. Generally, FTL maintains a logical address to physical address mapping table (L2P table) in the memory. There are two main mapping methods: block mapping (in units of blocks) and page mapping (in units of pages). The host sees It is a logical addre...

AI Technical Summary

Problems solved by technology

The existing technology is mainly focused on the power-on recovery of page mapping, which is very different from the power-on recovery of three-level mapping.

Images