Newbie question about server hard disks...

[falxes]

We have a HP Proliant ML370G5 server, with Windows 2008. 

This server has a Smart Array P400 raid controller. 

One of the disk of this server has failed. This disk was part of a RAID array of type 1+0.  The amount of disks of this array is two(I am counting the failed disk). 

The spare has arrived and now I have to swap the disk which has failed with the new one.  

My questions are: 

1)  Do  I need to turn off the server to plug it? If It were possible  I would like to avoid to turn off the server, because it has some Oracle databases for our ERP. 

2) What tool do I have to use to instruct the array controller to take the new disk and reconstruct the array?

Thanks in advance for your kind help. 

[Jimmy Vance]

With a P400 connected to a hot plug drive cage, all you should need to do is replace the failed disk with the new one and the system should automatically start the rebuild process.

Standard Discalimer: Before working with drives, make sure you have a good backup of the data.

[Torsten.]

Keep the server running, pull the bad disk and insert the new disk. check the status with ACU (array configuration utility).