Hello.
Let's assume that your disk controller (RAID) is onboard, i.e. it is included on the motherboard.
Usually the disk controller has a copy of its internal configuration and another copy on the disks.
When the controller fails, the controller is changed and the disks are connected so that the new controller detects the existing configuration on the disks. Usually a message is presented indicating that it detected a pre-existing configuration and if we want to use it, otherwise it will have to enter in the administration of the controller and activate the existing configuration in the disks.
Enrique Espinel
Senior Technical Support on IBM, Lenovo, Veeam Backup and VMware vSphere.
VSP-SV, VTSP-SV, VTSP-HCI, VTSP
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