Which storage condition prerequisites must be ensured?

You install a productive multi-host system with failover capabilities.

Which storage condition prerequisites must be ensured? Note: There are 2 correct answers.
A . The standby host has file access
B . The standby host has NO file access
C . The failed worker host has access to write files
D . The failed worker host no lonqer has access to write to files

Answer: A,D