Which of the following is correct about the InfoStamper feature of an OceanStor 9000 storage
system: (multiple choice)
A . Snapshot does not support nested, that is, the snapshot has been created directory, the parent directory and subdirectories can no longer create a snapshot
B . The root directory of the snapshot (that is, the directory used to create the snapshot) does not support deletion
C . Hard links are protected bysnapshots, soft links are not protected by snapshots
D . For a snapshot with an expiration time set, the system automatically deletes the snapshot but does not back up the storage space occupied by the snapshot data after the snapshot expires
Answer: C,D