Whether the primary and secondary LUNs must have the same owning controller in the clone feature

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The primary and secondary LUNs must have the same owning controller in the clone feature.

Other related questions:
Whether LUNs of OceanStor V3 storage systems have owning controllers
OceanStor V3 LUNs have owning controllers. However, the LUNs can be accessed from any controller.

Features of the owning controller
1. Each LUN belongs to only one owning controller. 2. The host can read and write data on the LUN not by the owning controller, but the mirroring channel between the controllers must be used.

5300 V3 clone specifications
OceanStor 5300 V3 clone specifications are as follows: Maximum number of primary LUNs: 128 Maximum number of secondary LUNs: 256 Maximum number of secondary LUNs in a clone group: 8 Maximum number of consistent split pairs: 64 For detailed specifications, see V3R1 Latest Software Specifications.

Method used to switch the owning controller of a LUN
You can switch the owning controller of a LUN as follows: The following method is used in the storage system when dual controllers run properly and a board is inserted and removed online without service interruption. 1. Check the owing controller of the LUN and perform switchover (controller B is used as an example). For subtending boards, perform operations on relevant LUNs on them. Log in to the primary controller. Check the primary and secondary controllers in CLI mode by logging in to the CLI mode and running the showmaster command. Query the owing controller that backs up the LUN by logging in to the CLI mode and entering showlun. Switch the LUN by switching LUN1 (LUN-ID 1) from controller B to controller A and entering OceanStor: admin> chglun -i 1 -c a in CLI mode. Command format: chglun -i LUN-ID -c controller-ID 2. Switch the LUN back to the original owing controller. Note: After the board is inserted, switch the owing controller of the LUN to the original one.

Whether data is synchronized between the primary and secondary LUNs if the HyperClone feature of the OceanStor V3 Series is in the non-split state
Data is synchronized between the primary and secondary LUNs if the HyperClone feature is in the non-split state.

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