Can we connect two raid controllers in standby?

I'm new to server machines and even even installing raid controllers, so pardon me if its too basic question.

We have a SuperMicro X10DRH-I Motherboard connected to a raid controller AOC-S3108L-H8Ir, both are supermicro products. We need to add one more raid controller in hot/cold standby with this controller.

My doubt is is this even possible and if possible how?

If not possible then a general question say if the current raid controller fails how can we recover the data, since data can be stored in any any hardisks given the controller is configured in RAID6, is recovering 100% data possible safely with surety?

Solution 1:

That's a normal LSI/3ware/Avago MegaRAID controller card, with SuperMicro branding.

If the card itself breaks, you replace it with another MegaRAID card. The configuration is stored on the disks, so you can restore arrays on the new card, this is a manual process though as there is a safety mechanism and the card requires confirmation before it will access disks that were initialized on another controller.

It is difficult to provision a standby, as most of the failure modes for the controller itself are not wear related, so the chance of the "standby" card failing first is rather high. I'd probably look into building a separate system and setting up replication.