Huawei distributed storage block storage provides volume hot migration capability

Which of the following descriptions about Huawei's data protection all-in-one solution is correct?
(Multiple Choice)

The migration solution based on Migration Director for NAS is an online migration solution, and the entire migration process does not need to stop customer business.

An enterprise plans to purchase a set of storage equipment. According to the IOPS requirements of the enterprise business, the IOPS that a single hard disk of storage needs to support is 3000.
Considering the cost factor, it is recommended to use which of the following hard disks best meets the requirements of the enterprise?

Which of the following combinations is recommended for the choice of networking and replication technologies in the two-site three-center disaster recovery solution provided by Huawei? (Multiple Choice)