Method used to expand LUNs of OceanStor V3 storage systems

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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
.

Other related questions:
Method used to expand file systems on OceanStor V3 storage systems
For details about the configuration method, see Expanding a File System .

LUN mapping of OceanStor V3 storage systems
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 .

Method used to detect new LUNs on the host of OceanStor T/V3 storage systems
If Huawei UltraPath is installed on the host, run the hot_add command to scan for disks. The existing services will not be affected. If the multipathing software is not installed, use the iSCSI network and restart the iSCSI service. If the Fibre Channel network is used, restart the server.

Method used to migrate data on heterogeneous LUNs of the OceanStor V3 converged storage systems
You can use the LUN migration, volume mirroring, or remote replication feature to migrate data on heterogeneous LUNs of the OceanStor V3 converged storage systems.

Principles and impact of expanding disk domains of OceanStor V3 storage systems
After the new disks are added to a disk domain, the system automatically performs migration to ensure that the used capacity of each disk is the same. The migration speed is related to the load of the disk domain. For example, if the I/O load on the disk domain is heavy, the migration speed is reduced; if the I/O load on the disk domain is light, the migration speed is relatively high. The migration speed has no major impact on the performance of a disk domain. However, it is still recommended to perform migration when the service load is light.

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