Whether LUNs of OceanStor V3 storage systems have owning controllers

1. For a RAID group consisting of SATA disks, it is recommended that LUNs in the same RAID group be configured with the same owning controller. For a RAID group consisting of other types of disks, it is recommended that LUNs in the same RAID group be allocated to different owning controllers. 2. Go to the Modify LUN dialog box. In the ISM navigation tree, choose All Devices > SN_XX > Storage Resources > LUN. (SN_XX is the name of the target storage system.) In the right function pane, select the LUN you want to modify. Click Modify. The Modify LUN dialog box is displayed. Modify the basic and advanced attributes of the 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.

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

After a host group and a LUN group are added to a mapping view, the application server, host group, and LUN group are logically associated. Then the application server can detect the LUN in the LUN group. For details about creating a mapping view, click Creating a Mapping View .

For details on how to expand LUNs on the DeviceManager, and then detect LUNs on the host to identify the expanded LUNs, see Expanding a LUN .