After you will replace the faulty disk please follow the below procedure:
1. Input MegaCli.exe –adpsetprop –copybackdsbl -0 –a0 , to enable Copyback fuction.
2. Input MegaCli.exe –pdcpybk –start –physdrv [8:15,8:4] –a0 , to start copyback operation. (8:15 was the hotspare disk and replaced
8:4 , after disk replacement, we copy data on 8:15 back to new disk 8:4)
3. Check MegaRAID Storage Manager tool, during copyback process, there is a small icon on the upper right of slot 4 drive such as below picture. The copyback process may last for several hours.
4. After the small icon disappear, it means the copyback process end. Now we should set disk 15 to spare disk .
Select disk 15, choose Make Global Hotspare in Operation page.