Sun Microsystems 6.0005E+11 manual Cooling Requirements, + peripheral supply1 11-12 13-14 15-16

6

Table 6-3Minimum and Redundant Working Power Supplies

Required to Power Active Boards

	Enterprise 5000/4000 Systems		Enterprise 6000 System
		Redundant Working		Redundant Working
Number of	Minimum Working	Power Supplies	Minimum Working	Power Supplies
Boards	Power Supplies	(Hot-pluggable)	Power Supplies	(Hot-pluggable)
1-2	1	2	1	2
3-4	2	3	2	3
5-6	3	4	3	4
7-8	3 + peripheral supply1	4 + peripheral supply	4	5
9-10			5	6
11-12			6	7
13-14			7	8
15-16			72	8

1.System needs a fourth PCM for cooling purposes.

2.System needs an eighth PCM for cooling purposes.

Failed power supplies must be replaced as soon as practical. Otherwise, the

Enterprise system will lose its redundancy and result in an outage at the next

PCM failure.

6.4.2 Cooling Requirements

Note – In the Enterprise system, all boards must be adjacent to a PCM. The fans in the PCM cool the boards. The minimum configuration is one PCM for every two adjacent boards.

The power supplies incorporate redundant bulk fan power so that the fans continue to operate in a failed power supply with the redundant fan power from the peripheral power supply.

6-10 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996