In the Huawei Active-active Disaster Recovery Solution, which of the following are required components? (Multiple choice)

Which of the following iSCSI connection modes is the most expensive but provides the best performance?

A company deploys a set of multi-select Huawei distributed storage in data center A and data center B.
It mainly uses block services to carry database, virtual machines and other application-related services, and uses block services to work with active-active features and upper-layer applications to ensure Business continuity. For this dual-active scenario, which of the following descriptions are correct? (Multiple choice)

The data capacity of site A is 2000GB, the data capacity of site B is 3000GB, and the data of site B is remotely copied to site A for storage, then the back-end storage capacity required by site A is (re-deletion ratio is 3):

In the deployment and implementation of storage solutions, which of the following steps need to be performed? (Multiple choice)