Intel SCB2SCSI Product Guide - Page 16

Acpi, Caution

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✏ NOTE The RJ45-to-DB9 adapter should match the configuration of the serial device used. One of two pin-out configurations are used depending on whether the serial device requires a DSR or DCD signal. The final adapter configuration should also match the desired pin-out of the RJ45 connector, as it can also be configured to support either DSR or DCD. For systems configured with both a front and rear RJ45 serial connectors, the adapters used for the rear port cannot be used with the front port, as the pinout for both RJ45 ports are different. For example, modem applications typically use DCD. In this case the user would use a DCD-configured adapter and set the jumper block as shown in Figure 3. ACPI The SCB2 supports the Advanced Configuration and Power Interface (ACPI) as defined by the ACPI 1.0 and PC97 specifications. An ACPI aware operating system can put the system into a state where the hard drives spin down, the system fans stop, and all processing is halted. However, the power supply will still be on and the processors will still be dissipating some power, so the power supply fans will still run. The SCB2 supports sleep states s0, s1, s4, and s5: • s0: Normal running state. • s1: Processor sleep state. No context will be lost in this state and the processor caches will maintain coherency. • s4: Hibernate or Save to Disk: The memory and machine state are saved to disk. Pressing the power button or other wakeup event will restore the system state from the disk and resume normal operation. This assumes that no hardware changes have been made to the system while it was off. • s5: Soft off: Only the RTC section of the CSB and the BMC are running in this state. No context is saved by the OS or hardware. CAUTION The system is off only when the AC power cord is disconnected. 16 Intel Server Board SCB2 Product Guide

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16
Intel Server Board SCB2 Product Guide
NOTE
The RJ45-to-DB9 adapter should match the configuration of the serial device
used. One of two pin-out configurations are used depending on whether the
serial device requires a DSR or DCD signal. The final adapter configuration
should also match the desired pin-out of the RJ45 connector, as it can also be
configured to support either DSR or DCD.
For systems configured with both a front and rear RJ45 serial connectors, the
adapters used for the rear port cannot be used with the front port, as the pin-
out for both RJ45 ports are different.
For example, modem applications
typically use DCD. In this case the user would use a DCD-configured adapter
and set the jumper block as shown in Figure 3.
ACPI
The SCB2 supports the Advanced Configuration and Power Interface (ACPI) as defined by the
ACPI 1.0 and PC97 specifications.
An ACPI aware operating system can put the system into a
state where the hard drives spin down, the system fans stop, and all processing is halted.
However,
the power supply will still be on and the processors will still be dissipating some power, so the
power supply fans will still run.
The SCB2 supports sleep states s0, s1, s4, and s5:
•
s0:
Normal running state.
•
s1:
Processor sleep state.
No context will be lost in this state and the processor caches will
maintain coherency.
•
s4:
Hibernate or Save to Disk:
The memory and machine state are saved to disk.
Pressing the
power button or other wakeup event will restore the system state from the disk and resume
normal operation.
This assumes that no hardware changes have been made to the system while
it was off.
•
s5:
Soft off:
Only the RTC section of the CSB and the BMC are running in this state.
No
context is saved by the OS or hardware.
CAUTION
The system is off only when the AC power cord is disconnected.