How does replace a hard disk on Dell PowerEdge RAID

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One day monitored a server had an emergency case, one hard drive failed.

To replace it:

Quickly to buy a new hard drive.
Unmounted the failed hard drive.
As RAID-5, the server supports one hard drive failed.

Showing ORANGE LED

Select the disk that is receiving SMART alerts and execute the Offline task. Manually remove the disk.
Mounted back a new hard drive. Then, the server auto started to re-build the RAID.
For monitoring status, rebooted the server, and went to the RAID Controller, "F10".

Other example, but not reboot the server: Monitoring rebuilding a RAID-1 from Dell OpenManage Server Administrator
For almost two hours, it was done the re-building, and the server have been back to normal.