I have the same problem with Netapp E2700.
I would be very grateful if you could describe it a liittle bit more detailed.
I enter the console mode and the only thing I can do is press Ctrl+Break and then S to enter Service Menu, which has only two points: 1) Display IP Config and 2) Display 7-segment LED codes.
Where you can enter M to proceed reset of lockdown mode?
What password you are using, if any?
Thanks a lot for your support.