Step 1. Log in to the OMU client to check whether any hard disk is about to be faulty or offline. All hard disks are normal and no faults occur.
Step 2. Use the Xshell5 tool (or SSH) to log in as the root user. Run the command smio_info disk -f 0 -d all to view all details about the hard disks, indicating that the capacity of hard disk 6 cannot be identified, as shown in Figure 2.
Step 3. Remove the hard disk and insert it again. The disk still cannot be identified. The slot corresponding to hard disk 6 functions properly after replace hard disk 6 with other disks. Therefore, hard disk 6 is faulty.