Restore EX2 Ultra original firmware / uboot from Debian

Hi guys, i got a new nas and want to restore the original firmware on my ex2 ultra that is currently running debian, can you guys please help me? I dont have a serial cable but if i remember correly there is a way using a usb pendrive.

Thank you all in advance :).

Looks like i need the original uImage und uRamdisk



Edited 1 time(s). Last edit at 05/23/2023 03:41AM by marcexeu.

SOLVED

Format USB pendrive on FAT32

Put both files from here on a folder called boot inside of the pendrive

put the pendrive on port 2

turn on the nas wolding up the reset button for at least 40 seconds

look what addresds it will show up on your network

it is booted in safe mode, you can now upload a original .bin file