Method and device for data storage and processing, solid-state drive system and data processing system

Abstract

The embodiment of the invention discloses a method and a device for data storage and processing, a solid-state drive system and a data processing system, wherein the method comprises the steps of: receiving a writing instruction sent by a host, wherein the writing instruction comprises operating data, and corresponding relationship information between a logic address LBA of the operating data in the host and a physical address PBA of a flash memory chip in the solid-state drive SSD system to be written in; writing the operating data in a cache memory in the SSD system, and writing the corresponding relationship information between the LBA and the PBA in a nonvolatile storage medium unit; and writing the operating data in the flash memory chip in the solid-state drive SSD system from the cache memory, and sending a writing instruction completion result message to the host. According to the embodiment of the invention, the SSD system can be enabled to timely respond to the writing instruction sent by the host in order to guarantee normal communication between the SSD system and the host.

Description

technical field [0001] The invention relates to data storage technology, in particular to a data storage and processing method and device, a solid-state hard disk system and a data processing system. Background technique [0002] Existing solid state disk (Solid State Disk, SSD) systems usually include a storage medium chip as a storage medium, a main control chip for controlling the SSD system, and a backup power supply for supplying power to the SSD system when the SSD system is abnormally powered off. module. In the existing SSD system, the flash memory chip is usually used as the storage medium chip, so that the SSD system has the advantages of fast access speed, shockproof and drop resistance, low heat generation, zero noise, and small size. [0003] In the SSD system, the read and write speed of the flash memory chip is much slower than the interface speed of the SSD system. In order to improve the performance of the SSD system, a high-speed cache memory (CACHE) is s...

AI Technical Summary

Problems solved by technology

[0006] In the process of starting to charge the backup power module until the power of the backup power module reaches a specific threshold, because the write command will cause the mapping relationship table entry in the cache memory to be modified, if the SSD system is abnormally powered off at this time, the backup power module If the battery power is not enough to support writing the cached data in the cache memory to the flash memory chip, it will cause serious problems such as loss of operation data and errors in mapping relationship entries. Therefore, the SSD system does not respond to the host during this process. The write command sent by the host will cause the host to kick the disk, that is, the host will think that the SSD system as the device is faulty, and will no longer communicate with the SSD system

[0007] In addition, in the process of detecting the working status of the backup power module, the SSD system also does not respond to the write command sent by the host, and with the increasing cache capacity of the cache memory, the capacity of the backup power module required is also increasing. The larger the value, the higher the specific threshold, which means that the waiting time for the battery charging of the backup power module to reach the specific threshold is longer, which increases the probability of kicking behavior on the host side, and cannot guarantee the SSD system and the host. normal communication

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