Which of the following scenes will cause host access storage service interruption?

There are 3 POOL for the OceanStor 18000 system that one customer business application used. All of them are 8D+1P RAID5. One day service interruption occurs, the engineers find some scenes that lead to the failures through analyzing the logs.

Which of the following scenes will cause host access storage service interruption? (Multiple choice)
A . In fully redundant network environment, the master reset occurs
B . under Close BST function case, BST bad sectors appear on the LUN
C . In the POOL with the services, all are ThinLUN and without configuring snapshot, LUN copy, clone and replication services. There are print information that POOL space filled with in the logs.
D . there are the following print in the log:
[2014-01-19 08:04:40] [Receive a disk-fault event of the disk (328) of pool (2) from ctrl.]
[2014-01-19 08:40:35] [Receive a disk-fault event of the disk (613) of pool (3) from ctrl.]

Answer: BC