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Functional Description B-13
B
With automatic system reconfiguration (ASR), a PCM can be taken offline and
replaced without halting the system. There are two restrictions:
1. The remaining power/cooling modules must provide sufficient electrical
power. As a general rule, the number of boards must be less than half the
number of PCMs.
2. The PCM should be replaced quickly so that any adjacent boards will not
overheat from lack of fan cooling.
B.9.2 Peripheral Power Supply
A system has one peripheral power supply. This power supply provides DC
power for the CD-ROM/tape tray and precharge power for hot-plugging
boards and power/cooling modules. The +5 VDC output of the peripheral
power supply is current shared with the +5 VDC outputs of the power/cooling
modules.
Figure B-9 Peripheral Power Supply