What is the correct statement about data routing and cluster management in the Huawei Fusionstorage architecture? (Multiple choice)

What is the correct statement about data routing and cluster management in the Huawei Fusionstorage architecture? (Multiple choice)
A . When the system starts, MDC and ZK interact to determine MC, and the main MDC and other MDCs monitor each other’s heartbeats. The master MDC decides who will take over after a certain MDC fails. Other MDC found that the main MDC was faulty and interacted with zk as the main MD
C . Query the main MDC when VBS starts and register with the main MD
E . Distributed storage system writes data. According to the LBA from the application layer and the block size, the VBS generates multiple Keys in units of 1MB, hashes the Keys into Partition IDs, and then follows up the Partition to find the main OSD, and the main OSD notifies the partition corresponding to the OSD to start writing data.
F . When the distributed storage system is created, N Partitions are generated in the space of 2 to the 32th power, and the backup OSD starting write data corresponding to the Partition is generated according to the distribution of the disk.
G . When the OSD starts, it queries the MDC from the MDC, reports the status to the home MDC, and the home MDC sends the status change to the VB
H . When the home MDC fails, the master MDC designates one MDC to take over, and at most two pools belong to one MD

Answer: ABCE