Control method and device for disk sectors

Abstract

The invention provides a control method and device for disk sectors. The method comprises the steps that write commands with the size smaller than that of the sectors are received, and the sectors corresponding to the write commands and sector command structures corresponding to the sectors are determined; if a sector state is a pre-read issuing state, the write commands are added into an issuing chain table; if the sector state is a write combining issuing state, the write commands are added into a wait chain table; when a pre-read command returns, the write commands in the issuing chain table are combined in the processes of pre-reading and caching contained pre-read data, and the combined data are written into the sectors; when a write combining command returns, if write commands exist in the wait chain table, the write commands in the wait chain table are added into the issuing chain table, the write commands in the issuing chain table are combined in the processes of pre-reading and caching the contained pre-read data, and the combined data are written into the sectors. By means of the technical scheme, the sectors can support the write commands with the size smaller than that of the sectors, space of the sectors is saved, the write command processing performance is improved, and memory resources are saved.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a method and device for controlling disk sectors. Background technique [0002] Currently, data can be written to and read from disk. Each track on the disk is equally divided into several arcs, and these arcs are the sectors of the disk. The read and write of the disk is based on the sector. Therefore, the data is written to the sector of the disk, and Read data from a sector of a disk. [0003] When writing data to or reading data from a sector, the sector only supports write or read commands whose data volume is larger than the size of the sector, and the write or read commands issued by the file system are all sector-sized Integer multiples of . For example, the sector size may be 512K, the write command is used to write 1M (512K*2) or 2M data into the sector, and the read command is used to read 1M or 2M data from the sector. [0004] However, with the rapid development...

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Problems solved by technology

[0004] However, with the rapid development of storage technology, in some application scenarios, it is often encountered that the write command or read command is smaller than the sector size, and the current sector does not support the write command or read command smaller than the sector size

For example, in block virtualization disk array management, each disk is divided into tens of thousands of virtual blocks. In order to manage these virtual blocks, it is necessary to write the management data of virtual blocks to sectors, and each virtual block occupies a Sector, the management data of each virtual block may only be a few bytes, which is far smaller than the sector size of 512K, so the sector does not support the write command of the management data of the virtual block

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