I have a OPi Plus, which I got because it has that SATA interface. I have Ubuntu-Mate loaded, and working ok, network is up, etc. I simply can't find the hard drive to mount it, format it, etc. There's no /dev/sdAnything.
Is there a driver I need to download? Something else? I understand it won't be fast, but USB speed is fine, I just need to connect to it. It's a 2.5" 1tb WD drive, which works fine on my desktop systems....
Did you use updated script.bin and uimage kernel for your installation? And, btw, does your hdd start properly (anu unusual sounds from drive, or maybe dead silence) - it might be an insufficiant power issue. If so, you can try to power the drive from other source.