HP Netserver Service Handbook, Volume 1 - Low End

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Rear View
Fan
Unit
Power
Unit
Power
Unit
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Fan
Unit
Power Cord
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Power Cord Connectors
Provides a connection for the AC power cord.
Environmental Services
Monitoring (ESM) Module
This board provides three functions:
Status reporting for the subsystem through the SCSI interface
SCSI connection between the subsystem and the host
Electrical isolation of internal and external buses.
Power Supplies There are two hot-swap power supply units accessible from the rear of
the system. Each unit is portable and hot-swappable containing one 250
watt, redundant switching, regulated power supply.
Fan Units
There are two fan units accessible from the rear of the system. Each is a
portable, hot-swappable unit.
Hot Swap Disk Drive Front View
P
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LED
A
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Drive Activity LED This LED blinks green to indicate SCSI
activity to and from the associated drive.
Power/Fault LED The LED lights above each drive indicate that
drive’s status. If the LED is green, the drive is operating correctly.