Dual controller disk array system and its data access method

Abstract

The invention provides a double-control disk array system and a data access method, wherein the system comprises a first controller, a second controller, a backboard provided with first and second port selection circuits and a disk array formed by SATA / NVMe hard disks. The first controller and the second controller are both connected with the backboard, after combined, the first and second port selecting circuits on the backboard are connected with the disk array; the method comprises the following steps: when the first controller receives the input / output signals transmitted by a mainframe, judge whether the first controller per se is a main controller preset according to a logical volume of the disk array corresponding to the input / output signals; if so, the main controller selects the first port selecting circuit from the backboard, which is corresponding to the first controller, so as to connect; if not, the main controller selects the second port selecting circuit from the backboard, which is corresponding to the second controller, so as to connect; and the main controller controls the logical volume access data of the disk array according to the input / output signals. The data access method can realize the active-active pattern of the double-control disk array system.

Description

technical field [0001] The invention relates to the technical field of computer data storage, in particular to a dual-control disk array system and a data access method thereof. Background technique [0002] A redundant array of independent disks (Redundant Arrays of Inexpensive Disk, RAID) mainly includes a front-end array controller and a number of back-end disks. The RAID algorithm is implemented in the array controller. When reading and writing the disk group, the read and write requests are distributed to each disk in parallel according to the specific RAID level, and the check calculation is completed at the same time, which satisfies the user's requirements in terms of performance and data integrity. need. [0003] A dual-controller disk array system (dual-controller disk array system) includes two controllers (the first controller and the second controller) and a disk array formed by multiple physical hard disks at the back end. The two controllers jointly manage D...

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide a dual-control disk array system based on SATA or NVMe hard disk because the SATA hard disk or NVMe hard disk does not have dual ports, so that the dual-control disk array system cannot implement active-active mode. The dual-control disk array system of NVMe disk and its data access method can realize active-active mode without the need for signal switching by adapter board and multiplexer AAMUX chip when the dual-control disk array system uses SATA hard disk or NVMe hard disk.

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