Once in the controller then you can just physically pull the failed drive out. After removing, then wait a moment and insert the new drive. If the Virtual Disk was degraded, then it should start rebuilding on its own once the replacement is inserted. If the Virtual Disk was Optimal, then physically pull the drive and insert the replacement. Then from the controller BIOS you can configure the replacement as a hotspare. 
I have a PowerEdge T300 with Perc 6/I and Raid 5 with 3 hot swap 15k 146 GB drives and 1 hot spare in the fourth slot of the backplane. HDD 0 is blinking amber while HDD1 thru HDD3 are green. I have a new hard disk drive to install. Do I have to reboot into the Perc 6/I setup, disable HDD0, then power down and replace it and power back up into Perc 6/I and add the new drive and then reboot. Will HDD 0 rebuild into the array or do I need to assign the new drive as the new hot spare? Are there instructions on how to replace a drive like this? Thanks, Mark
Disk Issue PowerEdge T300 Perc 6/I Raid 5