Method for writing data in storage device and storage device

Abstract

The invention discloses a method for writing data in a storage device and the storage device, and aims to solve the technical problem that a write cache is invalid due to the fact that data stored in the write cache is too much. The method comprises the following steps: determining an available storage capacity in a first storage space, wherein the first storage space is used for storing data written in a write back mode and data written in a write through mode; and writing the data stored in the write cache in a second storage space if the available storage capacity in the first storage space is less than or equal to a pre-set capacity, wherein the second storage space is used for storing the data written from the write cache.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a method for writing data into a storage device and the storage device. Background technique [0002] At present, in order to shorten the response delay to the host, storage devices usually work in the write-back mode. The write-back mode is a caching technology, that is, first write data to the write cache, and then write data from the write cache. To the caching technology in SSD (Solid State Drive, solid state drive). In the write-back mode, data is first written to the write cache. Once the data is written to the write cache, the storage device sends a signal that the write request has been completed, and then writes the data in the write cache to the SSD. [0003] However, as the amount of written data increases, the space of the SSD will gradually be exhausted. When the space of the SSD is exhausted, if there is data in the write cache that has not been written to the SSD...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method for writing data into a storage device and a storage device, wh

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