Which of the following statements about the storage system version upgrade is incorrect?
A . In the system, if the LUN is being formatted, the online upgrade operation cannot be performed.
B . The upgrade operation is not allowed when the current system is undergoing refactoring.
C . Upgrade operation can be done as long as the storage system has no alarms
D . The upgrade operation is not allowed when the current system is undergoing dynamic expansion.
Answer: C