Memory data recovery method, apparatus and system

Abstract

The invention discloses a memory data recovery method, apparatus and system and applies to solid state hard disks. The memory data recovery method comprises steps of determining a first storage unit of M storage units based on a first state parameter acquired from M storage units in the memory, acquiring N storage units from the storage units and meeting a first preset condition along with the first storage unit, processing data in the first storage unit and the N storage units when a second preset condition is met. M and N are integers larger than 1; and N is no more than M. With a selection of N storage units meeting the first preset condition along with the first storage unit, data of the first storage unit and the N storage units can be met and data of a plurality of storage units can be recovered; recovery rate can be improved and times for memory data recovery are reduced; and resource waste can be avoided.

Description

technical field [0001] The present invention relates to the field of control, in particular to a memory data recovery method, device and system. Background technique [0002] Hard disks are usually divided into mechanical hard disk HDD and solid-state hard disk SSD. Mechanical hard disk is an ordinary traditional hard disk, which supports overwriting and writing. Therefore, you only need to mark the deleted data, and it can be easily retrieved before it is overwritten by new data; while the solid-state hard disk is used A hard disk made of a solid-state electronic memory chip array is composed of a control unit and a storage unit. It does not support overwriting, so it must be erased first, that is, garbage collection. [0003] Data reclamation is mainly to select a suitable block from the blocks containing invalid data for reclamation operation. The block is located in the memory bank, and there are multiple blocks in the memory bank, and each block contains multiple pages....

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Problems solved by technology

[0005] In view of this, the present invention provides a memory data recovery method, device and system to solve the problem that in the prior art, only one storage unit can be selected and recovered at a time, resulting in waste of resources, increasing the number of times of memory data recovery, and reducing efficiency problem, the specific solution is as follows:

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