Before installing e with the easy installer (Linux), I have unlocked the OEM mode, directly reboot to download mode, loaded the latest TWRP and made a backup of the whole firmware (despite /data) to an usb stick.
After that, I have rebooted and got an error message in an language I don’t understand (maybe polnish?).
Because of that, I have rebooted into the original recovery and have done a factory reset.
Then, I used the easy installer to install e.
The step to unlock OEM mode didn’t work for me because the setting was not visible.
But because I have unlocked it before, I have ignored that and continued.
Everything went fine - until I should change the file system on /data to ext3:
There, the error message
mke2fs -t ext3 -m 0 /dev/block/sda25 process ended with ERROR: 134
Unable to wipe Data.
Error changing file system.
I have continued (resizing the partition did work) and get a booting e-os. Yeah!
Then, I restart into the recovery and try to change the partition layout again - no success.
Does anyone know if this is a problem for continuing using (and updating) e on my Galaxy S9?
How to fix the error with the file system change?