I get a message saying
Not enough space to dump xxxxx pages
Press any key to reboot
Safe to power off
After rebooting it never gets to the "Press CTRL D to continue or enter password for single user" message before it goes back to "Not enough space..." message above. Vicious cycle.
I believe the system is SCO OpenServer 5.0.5 (it may be 5.0.4) and I don't know if they have the root & boot floppies. but they do have good backups.