My CosmosEx (a floppy and hard disk replacement for the Atari ST) has recently started to hang on booting up with 3 yellow lights, and never completes it’s boot. It’s random though, if I power if off and try again, it seems it boots successfully about 1 in 5 tries.
I guessed it might be the original SD card that was starting to fail, so downloaded the latest image, flashed a new SD card. Rebooting now, it’s booting reliably every time.
Since this is a new startup from a fresh install, the initial disk device settings after first boot, are back to defaults. Accessing the CosmosEx via the web interface (the IP is displayed on the boot output if you connect an HDMI monitor), here’s the default settings:
I reconfigured the devices per the quick start guide here: