Dave,
Are those other drives virtual discs mounted in the system? Or are those regular hard discs?
If it the former, perhaps the root of the problem is different speed in mounting the discs (naturally, physical discs have priority in the system) if Xeoma server is installed to start with operating system start. Then we'd recommend you to try the following:
1) just in case, before you start, make a backup copy of settings and archives (
here's where the settings are being stored);
2) in Main Menu - Install - Autostart settings write the commands to mount discs as shown in example.
Does it help? If it's not applicable in the situation, please share more details with us so that we could help.