Handling procedure (Ensure the health of the S5600 first): 1. By repeating disk scanning in Disk Management on the host, no disk can be detected. 2. By remapping LUNs from the S5600 to the host, no disk can be detected. 3. Disks can be detected in Device Manager but not through disk scanning. Solution: Step 1 Uninstall the Microsoft iSCSI software and the multipathing software, and then restart the server. Step 2 Reinstall the multipathing software, and then scan for LUNs. Step 3 Ensure the data health of the services, and then start them.