[HOWTO] Install OPNsense 25.1 on Silver Peak FWA-ASP1012 EC-XS-Security Appliance

[rumshot]

Hello Team,

I bought a EC-XS too and could figure out most of the steps, until arrive this thread.
My issue is due to the fact the device is not detecting my usb stick and im unable to boot from it and install opnsense.
I was wondering if someone face that or would have a tip to give me.
I could potentially install the opnsense in another computer with ec-xs hd, but i dont know if when i swap it back to ec-xs it will detect the interfaces and so on.
Any guidance its welcome.
ps.: im mac user, then maybe im struggling a little bit and not sure if my usb stick its really booting.

[ThornB52]

Had a similar problem with the earlier version of this product [FW-7551a-SV1] when trying to boot from the -serial image.  Just went unrecognized.  The -nano image written to a USB stick did however boot.  The BIOS in the 7551 includes "UEFI" in it's name but surprisingly neither the SSD (SATA3 in this case) and the CF card in the case were EFI/GPT partitioned. YMMV