When the Communication Between MDC and OSD Is Interrupted or the OSD

Multiple Choice

When the communication between MDC and OSD is interrupted or the OSD is faulty, the OSD exists the storage pool. Then the OSD out-of-service alarm is reported. Which of the following are the possible cause of this fault? (Choose all that apply.)

A) A storage network exception occurs.
B) The disk in the server that houses the OSD is faulty.
C) The NVDIMM in the server that houses the OSD is faulty.
D) The OSD software is abnormal.
E) None of the above