SG-1000 fail after 2.4.2 upgrade

[Gil]

I have an SG-1000 that has failed after 2.4.2 upgrade.

I have tried to reflash it with the recovery drive via the OTG port, but I don't get the option prompt at the console.
The console shows attempts to rebuild, and stops at:
"ERROR: Impossible to mount filesystem, use interactive shell to attempt to recover it"

The only option I get is to hit any key to stop autoboot

I can issue basic commands such as reboot.

Any ideas?

[Gil]

My bad - I had the ADI memstick inserted instead of the uFW recovery.

Recovery seems to be functioning