DL380e G8 replace B320i controller with new Smart Array

Hello guys,

I've a server HP Proliant DL380e G8 with B320i controller attach it three disk SAS, on it is installed windows server 2012. I would like to buy new Smart Array P420 1GB FBWC     (code 631670-B21) for  replace old controller.

For migrate all data on three disks (I've windows 2012 server) without loose any data, is enough attach all disks in a new controller ?    there is some procedure to follow for avoid any issues?

thanks for support!

Andrew