I/O+ Boards - Sun Microsystems Enterprise 3500 System Reference Manual

B.4

I/O+ Boards

Several types of I/O+ boards are available: SBus+ I/O board, Graphics+ I/O board,
and PCI+ I/O board.
Note – Board slot 1 requires an I/O+ board because this is the only slot that
connects with the internal media tray. If slot 1 does not contain an I/O+ board, the
drives in the media tray will not function.
Note – All empty card cage slots must contain a filler panel.
B-8 Sun Enterprise 3500 System Reference Manual • August 2001