NEC Express 5800 120Eg, User Manual

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120Eg User Guide - System Overview
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Disk array system:
Any failed hard disk drive can be replaced while the system is running, provided a
RAID controller is installed.
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Redundant Power system:
When two power supplies are installed on the system a failed power supply can be
replaced by hot swapping.
Sleep Mode
The power/sleep button on the front of the server is used for saving power.
If the SLEEP mode switch is pressed, then the server enters into the sleep state In the
power saving mode, the memory data and the states of the jobs are kept unchanged. In
addition, the server in the power saving mode can accept accesses to hard disks from
other machines on the network and perform other network jobs.
Sleep mode requires an operating system that supports its function.
ACPI
The Advanced Configuration and Power Interface (ACPI) aware operating system can
place the system into a state where the hard drives spin down, some system fans stop,
and all processing is halted. However, in this state the power supply is still on and the
processors are still dissipating some power such that the power supply fan and some
system fans are still running.
Note: ACPI requires an operating system that supports its
feature.
This server system BIOS supports sleep states s0, s1, s4, and s5.
Caution
Only when the AC power is disconnected is the system com-
pletely off.
The sleep states are defined as follows:
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s0: Normal running state.
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s1: Processor sleep state.
No context will be lost in this state and the processor caches will maintain
coherency.