A. When removing the disk, the engineer needs to remove it from its connector, wait at least 60 seconds, and then remove the disk from the chassis.

B. The duration from removing the main storage disk to installing a normal one on the node cannot exceed 10 minutes. Otherwise, heat dissipation of the storage device will be affected.

C. The interval between removing the faulty disk and inserting a normal one is at least 10 seconds. Otherwise, the disk may be damaged.

D. Before using SmartKit to replace the disk, the engineer needs to complete the pre-processing as prompted. After that, the engineer can continue the subsequent operations.