Rather than not being detected at all, I suspect that Disk 1 (the 3GB drive) is actually your HDD, with a corrupted controller on the logic board. If I remember correctly, this can be fixed by flashing new firmware by someone who knows their stuff.
Then again, as there’s no valuable data on that drive, I would say you might as well get a new drive anyway. When a drive fails once, even if you manage to get it working again, I wouldn’t trust it.