Flash memory and magnetic disk conversion access method

Abstract

The invention discloses a flash memory and magnetic disk conversion access method, which relates to the technical field of computer storage media, and includes the steps: S1, receiving a read-write request transmitted by a file system; S2, analyzing logical addresses in the read-write request, and searching an address mapping table to obtain practical physic addresses, wherein the address mapping table includes the mapping relation from the logical addresses to the practical physic addresses of a flash memory and a magnetic disk; S3, converting the original read-write request into respective read-write requests of specific physical devices according to the physical addresses; S4, controlling respective controllers of the flash memory and the magnetic disk to complete read-write of data according to the respective read-write requests; and S5, returning the postback data after read-write to the file system according to the logical addresses. By the aid of the method, the access time for a mixed storage system with the flash memory and the magnetic disk in read-write is shortened.

Description

technical field [0001] The invention relates to the technical field of computer storage media, in particular to a flash memory and disk conversion access method. Background technique [0002] With the development of flash memory technology, flash memory has gradually become an auxiliary storage medium that can keep pace with disk in the storage field. At present, the capacity of disks is at the terabyte level, while the capacity of some solid state drives based on flash memory technology can reach hundreds of gigabytes. Since both flash memory and disk have their own advantages, how to integrate their respective advantages and avoid their respective disadvantages has become a major problem. Previous research has focused on mixing of non-peer status, on-disk and on-flash optimizations. The non-equivalent status is that flash memory exists as a disk cache. And based on peer-to-peer flash disk hybrid disk research focuses on disk arrays or mainframes. In fact, in ordinary p...

AI Technical Summary

Problems solved by technology

Due to the complexity of user operations, the position of the head is random, so this delay cannot be avoided

And if the data is stored on flash memory, there is no such time delay

Although in a non-equivalent hybrid system, flash memory as a disk cache can relatively reduce the time delay to a certain extent, but the disk is mainly used as a storage medium, and this time delay is still relatively large.

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