Change frame, hdd's show as dead

Please in future don't do a USB Boot Recovery unless suggested to as it's not very reliable. In your case it sounds like it worked fine, but often it can have a negative side effect which requires tech support to remotely login to fix. What I would've suggested had I suspected the unit you migrated to was on firmware older than 4.2.15 was to power down, put a spare disk (must not be from your array) in, do a factory default, update to 4.2.16 then 4.2.19 then power down, remove the spare disk and put your drives in, verify things are working fine then update to 4.2.21 again.