Update to 6.10.1 unable to boot

Upgrade from 6.9.5 hf1 to 6.10.1 boot stuck at encryption unlock
Hello, 

I did the firmware update from 6.9.5 hf1 to 6.10.1 lastnight and now my 428 will not get past volume decryption It gets to 89 or 91 % and stays there for hours. 

I have an EDA500 attached to it and have tried with it turned off. Same result. 

I've also tested putting the encryption keys on another flash drive. 

no dice

Any held would be appreciated.