unlock encrypted volumes after reboot?

I have been running V11 for the last 6 months for personal use on my home netowrk - my first work with freenas.  I upgraded to 11-1 last week and upon reboot I had to unlock the storage.  I have 4 WD reds, encrypted with passphrase and key.  After the upgrade, I had to unlock the storage.  Also, the server shutdown about a week ago due to a power outage (automatic shutdown based on UPS power level).  After reboot, the storage was again locked.

I am not often home, though I can VPN to the...

unlock encrypted volumes after reboot?