Regarding the description of the hard disk domain in Huawei RAID 2.0+ technology, which of the following statement is incorrect?

Regarding the description of the hard disk domain in Huawei RAID 2.0+ technology, which of the following statement is incorrect?
A . A hard disk domain is a group of hard disks
B . A hard disk can only belong to one hard disk domain
C . OceanStor V3 storage system can create one or more disk domains
D . In a disk domain, disks of the same type must be of the same size and rotational speed

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Answer: D