I've finally got what I think is a good sysgen for my PDP-11, but I'm having a hard time getting it to boot from an RA80. Here is the machine config: PDP-11/24 Unibus Map Memory Map Floating Point Unit Extended Instruction Set DZ11 Async board 512 KW (1024 KB) Ram Two RL02 Disk Drives One RA80 Disk Drive with MSCP controller Here is the sequence of commands I am using to transfer the system from the RL02 (where it was sysgened) to the RA80: (BRU Initializes DU0) XDT> G RSX11M V4.4 BL 46 Note: A 'DEV' command at this point shows all the proper devices and redirects. The RA80 Ready light flickers for a few seconds, then the channel select light will go off and back on twice. Then the system hangs. If I boot from the RL02 at this point, and then try to boot from the RA80, the system will hang again. Booting from the ODT prompt (173204g) yields the same result. The system hangs wether or not I specify the /MOU option to the 'SAV' command. If I try the boot right after the BRU command, I get the expected "Device does not contain a hardware boot block' message, so I know the MSCP controller is working. I don't know why I can boot the first time with the 'BOO' command, but not subsequently. Anyone out there have any clues?