Hi @Caligari, this is a different issue (no worries on not opening a new thread). Currently balenaOS utilizes a specific order for picking the drive as seen here:
# On Intel genericx86-64, we flash on internal hard disk drive
# The first one found will be used
INTERNAL_DEVICE_KERNEL = "nvme0n1 sda sdb mmcblk0 mmcblk1"
We already have an open issue to look into how this could be made customizable: https://github.com/balena-os/meta-balena/issues/1835
I noted your interest in there and we’ll post an update as we make progress.
For now, you could utilize this tool as a workaround: https://github.com/balena-os/resin-image-flasher-unwrap
The tool extracts the disk image from the flasher so you can write it directly to the SSD. Once you make sure that your device appears on balenaCloud by booting from SSD, you could add HDD as persistent storage.
Let us know how it goes.