View source for 17339535. Control Device Switching Method, Control Device, and Storage System simplified abstract (Huawei Technologies Co., Ltd.)

=Control Device Switching Method, Control Device, and Storage System=


==Organization Name==

[[:Category:Huawei Technologies Co., Ltd.|Huawei Technologies Co., Ltd.]]


[[Category:Huawei Technologies Co., Ltd.]]

==Inventor(s)==

[[:Category:Zunyi Liu of Chengdu (CN)|Zunyi Liu of Chengdu (CN)]][[Category:Zunyi Liu of Chengdu (CN)]]

==Control Device Switching Method, Control Device, and Storage System - A simplified explanation of the abstract==


This abstract first appeared for US patent application 17339535 titled 'Control Device Switching Method, Control Device, and Storage System

==Simplified Explanation==

The patent application describes a method for switching control devices in a storage system to improve access to logical unit numbers (LUNs) by a host. Here are the key points:

* The method involves obtaining configuration information of a LUN from a second control device by a first control device.
* The first control device provides a first path to the host based on the configuration information, allowing the host to access the LUN using the first control device.
* The first control device notifies the second control device to set a second path to be faulty, indicating that it should not be used for accessing the LUN.
* The first control device then switches the path for the host to access the LUN from the second path to the first path.
* The second path is intended for the host to access the LUN using the second control device.

Potential applications of this technology:

* Storage systems with multiple control devices that need to efficiently switch between them for accessing LUNs.
* Environments where high availability and fault tolerance are crucial, as the method allows for seamless switching of control devices without disrupting host access to LUNs.

Problems solved by this technology:

* Ensures uninterrupted access to LUNs by providing a reliable and efficient method for switching control devices.
* Reduces the risk of data loss or downtime when a control device needs to be replaced or undergo maintenance.

Benefits of this technology:

* Improved system reliability and availability as the method allows for seamless switching between control devices.
* Enhanced performance by providing a more efficient path for host access to LUNs.
* Simplified management and configuration of storage systems with multiple control devices.


==Original Abstract Submitted==

A control device switching method includes obtaining, by a first control device, configuration information of a logical unit number (LUN) from a second control device coupled to the first control device, where the LUN is created in a storage device and is accessed by a host through the second control device, providing, by the first control device, a first path to the host based on the configuration information, where the first path is for the host to access the LUN using the first control device, notifying, by the first control device, the second control device to set a second path to be faulty, and switching, by the first control device, a path for the host to access the LUN from the second path to the first path. The second path is for the host to access the LUN using the second control device.



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