HP LH4r HP Netserver Service Handbook, Volume 1 - Low End - Page 82

Hot Swap Disk Drive Front View

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Rear View ESM Fan Unit Fan Unit Power Cord Connectors Environmental Services Monitoring (ESM) Module Power Supplies Fan Units Power Unit Power Unit Power Cord Connectors Provides a connection for the AC power cord. 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. 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. 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 Power\Fault LED A L 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. 76

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76
Rear View
Fan
Unit
Power
Unit
Power
Unit
ESM
Fan
Unit
Power Cord
Connectors
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
Power\Fault
LED
A
L
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.