Thanks for your help. I did as you wrote. After marking the SystemV46 disk as global, it appeared in my AmigaOS 3.2.3 system configuration. Now I have a list of HDF0 disks: with AmigaOS 3.2.3, boot priority 0, and DH0: with SystemV46, boot priority 0. Unfortunately, I can't change the SystemV46 boot priority. After running this configuration, the system starts, but after a few seconds, the A1200NG freezes and displays a red frame. GuruMediation
