Hi,
It depends on which kind of disk set you're trying to make : generic (local DR) or specific (for remote DR) disks?
If you wish to prepare DR floppies for the server where ARCserve resides, use only generic disks. The 5th disk won't be created as it's normal. Use "specific" only for making DR disks for a server without ARCserve and without a tape drive (you need Advanced Edition for doing so...).
Remember to run windisk and make a full backup of your server BEFORE running the DR Wizard.
Hope this helps,
LST