Principles and impact of expanding disk domains of OceanStor V3 storage systems

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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.

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 .

Method used to expand LUNs of OceanStor V3 storage systems
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 .

Recommended number of disks in each disk domain of the OceanStor V3 storage
Each tier under each disk domain has a maximum of 50 disks. Each disk domain has fewer than 100 disks.

Recommended hot spare policy for disk domains of the OceanStor V3 storage
The high hot spare policy is recommended for disk domains of the OceanStor V3 storage.

Disk enclosure layout on OceanStor V3 storage systems
All enclosures are evenly distributed among the SAS ports. The quantity difference of disk enclosures connected to each SAS port cannot exceed one. For details about the networking, see the Huawei Storage Networking Assistant: http://support.huawei.com/onlinetoolsweb/sna/?language=en

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