What server you have? Is the server support H740? H740 can support virtual disk created on H730. Once the controller is replaced all the disk will show as foreign disks. You will be able to get the virtual disk working on H740 by importing foreign configuration. This is only supported on Dell controller.  You can refer below link for details [URL] Note : I will recommend to take backup your data before carrying out any such maintenance tasks.
Hi, I have created a raid with H730 mini controller. If I change controller ( for example H740) will the new controller recognize my raid? Do I need to use only dell controllers or the raid is compatible also with other brands? Thanks, Mario
Raid compatibility among controllers