Configuration Rules 2-17
You can install one RRD46/47-VA CD-ROM drive for each secondary partition
in your system, if, for example, you have no network adapter or installation
server available and want to boot from a CD-ROM in each partition.
If you put these disks in the main or expander cabinets, they must occupy the
rightmost shelf at the front of the cabinet. They protrude from the shelf, and
the front door will not close if they are in other shelves.