Data routing inspection method and device in solid state memory

Abstract

The invention discloses a data routing inspection method and device in a solid state memory, and belongs to the technical field of storage. The method comprises the following steps that: in a current routing inspection period, according to time for a storage block mounted in a first linked list group to be mounted to the first linked list group, reading an effect data page stored in the storage block mounted in the first linked list group; storing the read effective data page into a startup storage block; and mounting the startup storage block started in the routing inspection period to a second linked list group according to time when the startup storage block is started, when a routing inspection period next to the current routing inspection period begins, taking the second linked list group as the first linked list group, and taking the first linked list group as the second linked list group. By use of the method, on the basis of the optimization of data stability, stable data is cohered to parts of blocks, and the blocks which can be used by unstable data are increased so as to improve a redundancy ratio, reduce write amplification and abrasion for an SSD (Solid State Disk) and prolong the service life of the SSD.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a data inspection method and device in a solid-state storage. Background technique [0002] A solid state disk (Solid State Disk or Solid State Drive), also known as an electronic hard disk or a solid state electronic disk, is a hard disk realized by a solid state electronic storage device, and is mainly composed of a controller and a memory. The interface specifications, physical size, and usage of solid-state hard disks are the same as ordinary hard disks. Its special feature is that it has no mechanical structure and uses the unique storage medium NAND Flash characteristics to perform write operations in units of storage blocks. The erase operation is performed in units of pages. SSD solid-state hard disk gets rid of mechanical parts such as the head of the mechanical hard disk, the disk shaft and the control motor. There is no process of motor acceleration and rotation, and...

AI Technical Summary

Problems solved by technology

[0008] Since the above inspection method is to inspect the storage blocks in the SSD according to the logical address, the stable data that has not been erased for a long time and the active data that has just been written will be migrated to the same storage block during the inspection process , because the active data in the storage block may be updated soon and become an invalid data page, while the stable data will not be updated, it is still a valid data page. In this way, when erasing the storage block, it is necessary to Valid data pages are migrated, which increases write amplification

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