Compaq ProLiant 8000 Compaq ProLiant 8000 Server Technology - Page 16

Power-Down Controls, Self-test., Auto Line Sensing., LED Standby Controls.

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TC000603TB TECHNOLOGY BRIEF (cont.) ... The microcontroller performs the following functions: • Self-test. The intelligent power supplies perform their own power-on self-test (POST) that checks temperature, RAM integrity, ROM version, analog-to-digital conversion accuracy, and nonvolatile memory integrity of the power supply. • Auto Line Sensing. Because the power supplies are rated for both 1150 watts (at 220 volts) and 500 watts (at 110 volts), a line-sensing feature automatically recognizes which line voltage is connected. The customer does not need to configure the supply for voltage. • LED Standby Controls. The microcontroller also drives two status LEDs on the back of the power supply that indicate power status, as shown in Figure 9. This gives the user vital status information at a glance. Clear - Front panel power switch off or open interlock Flashing Green - Power on delay or software power off Green - Outputs on and good Flashing Amber - Failed self test Amber - Outputs failed Flashing Amber/Green - Restart failed Green - AC power good Clear - AC power not good Figure 9: Power supply LED status indicators. Power-Down Controls As shown in Figure 10, the server power switch connects to the Advanced Configuration and Power Interface (ACPI) controller rather than directly to the power line. This means that turning off the power switch does not turn off power instantly. Instead, the ACPI controller communicates with the system board and the OS. The power-down controls can be configured in one of three ways: • Secure mode - Power supply will not shut down if power switch is pressed. • Delay mode - Power supply will shut down after a 10-second delay. This allows time to reactivate the switch if it was mistakenly pressed. • Graceful shut down - A 10-second delay counter begins as a message warning of an imminent power-down goes to Compaq Insight Manager and the IMD. Because of the communication between the ACPI controller and the OS, the OS can delay the power down until all running applications have properly closed. Should the OS not be running, the power would go down when the delay counter expired. The power-down control feature is supported under Microsoft Windows NT and Novell NetWare. SCO is planning to implement support for the power-down control in the future. 16

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T
ECHNOLOGY
B
RIEF
(cont.)
16
TC000603TB
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The microcontroller performs the following functions:
•
Self-test.
The intelligent power supplies perform their own power-on self-test (POST) that
checks temperature, RAM integrity, ROM version, analog-to-digital conversion accuracy, and
nonvolatile memory integrity of the power supply.
•
Auto Line Sensing.
Because the power supplies are rated for both 1150 watts (at 220 volts)
and 500 watts (at 110 volts), a line-sensing feature automatically recognizes which line voltage
is connected.
The customer does not need to configure the supply for voltage.
•
LED Standby Controls.
The microcontroller also drives two status LEDs on the back of the
power supply that indicate power status, as shown in Figure 9.
This gives the user vital status
information at a glance.
Clear - Front panel power switch off or open interlock
Flashing Green - Power on delay or software power off
Green - Outputs on and good
Flashing Amber - Failed self test
Amber - Outputs failed
Flashing Amber/Green - Restart failed
Green - AC power good
Clear - AC power not good
Figure 9:
Power supply LED status indicators.
Power-Down Controls
As shown in Figure 10, the server power switch connects to the Advanced Configuration and Power
Interface (ACPI) controller rather than directly to the power line.
This means that turning off the
power switch does not turn off power instantly.
Instead, the ACPI controller communicates with
the system board and the OS.
The power-down controls can be configured in one of three ways:
•
Secure mode – Power supply will not shut down if power switch is pressed.
•
Delay mode – Power supply will shut down after a 10-second delay.
This allows time to
reactivate the switch if it was mistakenly pressed.
•
Graceful shut down – A 10-second delay counter begins as a message warning of an imminent
power-down goes to Compaq Insight Manager and the IMD.
Because of the communication
between the ACPI controller and the OS, the OS can delay the power down until all running
applications have properly closed.
Should the OS not be running, the power would go down
when the delay counter expired.
The power-down control feature is supported under Microsoft Windows NT and Novell NetWare.
SCO is planning to implement support for the power-down control in the future.