That's what I did after my 15 year old Synology DS1010+ built in USB DOM failed. Put a network booted debian on it via netboot.xyz with zfs and now i get to reuse those 15 year old 2TB still chugging along disks. Fully open source, pretty nice way to keep old hardware going. It's my tertiary backup that wakes up once a week pulls in some open weights LLM models that I hoard just in case and goes back to sleep.