If you aren’t using hardware raid or another disk management tool that locks you in to one manufacturer or worse one unique controller - you should be able to t

If you aren’t using hardware raid or another disk management tool that locks you in to one manufacturer or worse one unique controller - you should be able to take your disks to any other machine and rebuild your array. At least, that’s how you should be constructing a home NAS if that’s what you’re doing. The same situation can arise with a popular/managed solution like qnap/syno. I have a DS918 and really love it (it’s one of those set it and forget it machines) but I don’t totally know how it works. It’s Linux of course, but it’s sorta a black box. So I think there is a lot to be said for DIY as long as you are aware of the drawbacks and engineer around them accordingly.