First off, its a NetWare server not a Novell server
NetWare keeps files that you delete in case you want to restore them later on. If you are sure you don't want to salvage any deleted files, you need to purge the entire SYS volume.
1. In ConsoleOne, open the eDirectory tree that contains the server you want to manage.
2. Select the SYS volume that you want to work with.
3. Click View > Deleted File View. The Deleted File section lists the deleted file, the file size, the deletion date, and the user's name.
4. Select the file you want to salvage or purge.
5. Click Salvage or Purge on the ConsoleOne toolbar.
If the SYS volume runs out of space, the server can Abend and possibly won't boot when you try to bring the server back up. You may also need to run some filesystem and eDirectory repair utilities.
Nothinman is on the right track. If you don't want to move the print spool directories, you can set an atrribute on those directories to purge them immediately. Typically, print spool directories you won't care about salvaging the files in there once they are deleted.