Sun Microsystems 280R manual Pci

The table below shows the mapping of the PCI slots to the two PCI buses and the type of PCI cards supported in each slot.

					Clock
Back Panel	Board	PCI	Slot Width (bits)/		Rates	DC Voltage/
Slot Label	Address	Bus	Card Type (bits)		(MHz)	Card Type
PCI 1	J2301	A	64	/ 32 or 64	33 or 66	3.3 v or Universal
PCI 2	J2401	B	64	/ 32 or 64	33	5.5 v or Universal
PCI 3	J2501	B	64	/ 32 or 64	33	5.5 v or Universal
PCI 4	J2601	B	32	/ 32	33	5.5 v or Universal

For the board addresses of the PCI slots on the main logic board, see the Sun Fire 280R Server Service Manual.

Configuration Rules

The following rules apply for your system:

■All slots support PCI universal cards.

■All slots support PCI long or short cards.

■Each slot can supply up to 15 watts of power.

■The total power used for all four slots must not exceed 60 watts.

You can install PCI cards into any compatible PCI slots. Slots need not be filled in any particular order. In most cases, the system’s I/O performance will be unaffected by placement of PCI cards in the slots. Heavily loaded systems, however, will deliver better overall performance by installing high-throughput interface cards on separate buses. Examples of high-throughput interfaces are dual-channel UltraSCSI host adapters and ATM-622 interfaces.

You can also improve overall system availability by installing redundant storage or network interfaces on separate PCI buses.

Chapter 4 Hardware and Software Configuration 85