ge62 2qf apache pro

I found msi ge62 2qf 970m version in cheap price because its body is rough and tad bit damaged, im thinking about buying that laptop and later buying its body from aliexpress,there are multiple vendors of msi ge 62 body parts but they differ in end model (like MVR ,2QD and so many models)there...

My question is this: If you install a RAID controller card and are going to run RAID6 do you need the drives to be hooked to a backplane or to be hot swap capable or can the entire unit be shut down to make the replacement of the failed drive?