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1. (WO2018108072) MAGNETIC DISK ACCESS METHOD AND HOST

Pub. No.:    WO/2018/108072    International Application No.:    PCT/CN2017/115633
Publication Date: Fri Jun 22 01:59:59 CEST 2018 International Filing Date: Wed Dec 13 00:59:59 CET 2017
IPC: G06F 3/06
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: XIONG, Xiaoyong
熊小勇
Title: MAGNETIC DISK ACCESS METHOD AND HOST
Abstract:
A magnetic disk access method and a host, capable of reducing the time delay caused by I/O forwarding. The method is applied to the host, at least one logical unit (LU) is connected to the host, each LU comprises at least logical address space, and each logical address space corresponds to an access path. The method comprises: generating an input-output (IO) request, the IO request carrying a logical unit number (LUN) and a virtual address of data to be accessed (S210); finding, according to the LUN, an LU accessed by the IO request, and determining, according to the virtual address, a virtual address space within which the virtual address falls (S220); determining an access path corresponding to the virtual address space according to the determined virtual address space (S230); and delivering, through the access path, the IO request to a controller directed by the access path, so that the controller accesses a magnetic disk to which the controller belongs according to the LUN in the IO request and the virtual address and obtains data requested by the IO request (S240).