CONTROL DEVICE SWITCHING METHOD, CONTROL DEVICE AND STORAGE SYSTEM

This application provides a control device switching method, where the method is applied to a first control device, the first control device is connected to a second control device, and accesses, by using the second control device, a storage device that can be accessed by the second control device,...

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Bibliographic Details
Main Author LIU, Zunyi
Format Patent
LanguageEnglish
French
German
Published 01.12.2021
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:This application provides a control device switching method, where the method is applied to a first control device, the first control device is connected to a second control device, and accesses, by using the second control device, a storage device that can be accessed by the second control device, and the first control device and the second control device are separately connected to a host. The method includes: obtaining configuration information of a LUN in the second control device; mapping a first path to the host based on the configuration information of the LUN, where the first path is a path for the host to access the LUN by using the first control device; and notifying the second control device to set a second path to be faulty, and switching a path for the host to access the LUN from the second path to the first path, where the second path is a path for the host to access the LUN by using the second control device. According to the technical solution provided in this application, performance of a storage system is not lowered during control device switching, and a control device may be replaced when a connection structure of a controller in the control device changes.
Bibliography:Application Number: EP20190893961