Reply To: All your eggs in one basket == Cloud Disaster!
If you’re sure the data is OK then that sounds like a plan. When you put the drive in it will start to rebuild the array, the easiest thing to do is a hard factory reset.
Get a paper clip or a SIM card removal tool and hold down the reset button for about five seconds—until you hear a beep. Then let go immediately. Right after that, hold down the reset button again for five seconds until you hear another beep. Let go immediately after that.
Your NAS will beep a couple more times, and then the NAS drive will reboot. After a couple of minutes, the status light will blink orange. DSM is now ready to be reinstalled.
Just shout if you need any help, always happy to pass on my knowledge of these boxes.