When the phone is accessing the LINUX client of Huawei Oceanstor 9000 cluster, the number of concurrent NFS on the client can be appropriately reduced to improve access performance

In OceanStor V3 storage systems, remote replication allows a user to perform a primary/secondary switchover when the secondary LUN is in which data statuses? (Multiple Choice)

A customer purchases nine OceanStor 9000 storage nodes. During the deployment planning, the customer requires that data integrity be not affected if any three disks in a storage node are faulty, and the overall storage space utilization be not lower than 80%.
Which of the following is the most proper redundancy ratio?

All EXP port of OceanStor enterprise storage systems must connect to PRI ports.

Regarding the principle of Erasure Code N+M redundancy technology implemented in Oceanstor 9000, which one of the following descriptions is wrong?