Automatic correcting method and device for aligning storage device addresses

Abstract

The invention discloses an automatic correcting method and device for aligning storage device addresses. The method includes the steps that the logic address of an access request is detected to be an unaligned access address through a mapping table, correction alignment operation is performed on the unaligned access address according to offset recorded in the mapping table, and if the logic address of the access request is not detected to be the unaligned access address, the logic address is saved in a logic address statistic cache. When the number of items in the cache reaches the upper limit, the migration process is executed; unaligned access address fields not detected by the mapping table are judged, the mapping relation between the logic address and a physical address is established and added in the items of the mapping table, and the unaligned access address fields are aligned; data in the physical address corresponding to the logic address of the aligned access request are read. Due to the scheme, the defects that in an existing alignment scheme, an upper application needs to be reconfigured, execution is performed manually, and usability is poor are overcome.

Description

technical field [0001] The invention relates to the field of computer data storage, in particular to an automatic correction method and device for address alignment of a storage device. Background technique [0002] As the capacity of computer data storage systems continues to increase, the way underlying storage devices manage capacity is also constantly changing. [0003] The physical block size of traditional mechanical hard disk is 512 bytes, while the physical block size of newer storage devices such as mechanical hard disk using advanced formatting technology is 4096 bytes, and the physical block size of solid-state hard disk is generally 4096 bytes-16384 bytes . When the computer system is designed for a traditional mechanical hard disk, the computer system cannot correctly identify the physical block size, and the address of each access request to the storage device may not be aligned with the starting address of the physical block of the storage device. When non-a...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes an automatic correction method and device for address alignment of storage devices, which can solve the problems existing in existing storage device alignment correction solutions that require reconfiguration of upper-layer applications, need for manual execution, and poor usability. shortcoming

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