Which of the Following Are Correct Regarding the Huawei Oceanstro

Which of the following are correct regarding the Huawei Oceanstro 9000 V100R001C30 products for video monitoring services? (multiple choice)

A) To improve the reliability of the video data storage device, the user turns on the securevideo feature of the data disk using a 4 + 1 protection level
B) The user turns on the securevideo feature, with two data corruptions if the data disk uses a 4 + 1 protection level and only 3 for a write operation
C) Users open the securevideo feature data consistency scanning, the system does not complete the data files, will be cleaned up
D) After the user turns on the securevideo feature, the file corruption event has been reported while reading and writing files, and the data recovery failure alarm is no longer reported