Assuming the server console still offers the setup menu of previous
versions of FreeNAS (continued with the current renamed to NAS4Free
project), you should be able to setup the password here.
You'll need to have a montor and keyboard connected to the server in
order to do this. If you're running the box "Headless", this means
you'll need to connect a monitor (no problems doing this 'live') and a
keyboard.
With PS/2, officially you're not supposed to 'hot plug' a PS/2
keyboard but I've yet to have buggered anything up doing this during
the last two decades I've been working on PCs. However, the OS
probably won't recognise the attached keyboard without a reboot. In
the case of a usb attached keyboard, you'll probably have the same
problem (it may or may not work - I've never tested this).
You might have to shut down before attaching monitor and keyboard. A
momentary press of the power button might trigger a proper shutdown
(saving you having to force the issue and risk FS errors by leaning on
the power button for the 4 second watchdog timeout period that allows
the bios to wrest control back from the OS and 'pull the plug').
I can't offer any further details since the FreeNAS project was taken
over by iXsystems who trademarked the name forcing the original
developers to rename the freenas project as "NAS4Free". As a
consequence, FreeNAS no longer seems to be as open as it once was.
The best I could do was locate a readme file in the hope that there'd
be some mention of any special procedures to follow for this last
upgrade as was the case for yesterday's NAS4Free upgrade.
Unfortunately, there was no mention of any such upgrading instructions
so no help there to explain what may have gone wrong.
--
Regards, J B Good