Which of the following scenarios will cause Oceanstor 18000 to initiate local refactoring? (Multiple choice)

Which of the following scenarios will cause Oceanstor 18000 to initiate local refactoring? (Multiple choice)
A . Hard disk failure
B . The system detects CK that can’t be repaired
C . Insert the drive back within two minutes after it is removed.
D . IO access returns SECTOR FAULT error

Answer: BD