Hello @tjmitchem 
Yes it is doable, but not advisable. There is a driver for AMD RaidXpert for linux, but the support seems to be pretty non-existent: GitHub - thopiekar/rcraid-dkms: AMD RAIDXpert driver as DKMS package
So in your case, if you want to keep the data as it is on array3, then don’t do it. You will get more problems than its worth for a switch.
If you want to switch, then just use a normal software raid with mdadm.