Whether an entire disk domain fails to work if the engine of a V3 series unified storage system is faulty and if the disk domain crosses multiple engines

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In this case, some disks in the disk domain can be read and written. If a host requests to access data on the faulty engine, a read/write failure message is returned.

Other related questions:
Restrictions on creating a disk domain across engines in the OceanStor V3 Series
Currently, cross-engine disk domain creation based on IP scale-out is not recommended. You are advised to create a disk domain on one engine. If you want to create a disk domain across engines, evaluate your service performance and ensure that the bandwidth does not exceed 10GE and the latency meets your service requirements.

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.

Whether the HyperClone feature of the OceanStor V3 Series supports cross-engine or cross–storage system clone
The HyperClone feature does not support cross-engine clone of LUNs. The primary and secondary LUNs used for cloning must reside on the same engine.

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.

Maximum number of disks in a disk domain of 6900 V3
The OceanStor 6900 V3 storage system V300R001 supports a maximum of 2000 disks in a single disk domain. For detailed specifications, see V3R1 Latest Software Specifications.

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