Service Guide

BIOS Setup Utilities
Intel
®
Server System P4000IP and Intel
®
Workstation System P4000CR Service Guide 175
When this setting is changed in Setup, the new setting will be sent to the BMC. However, the
BMC maintains (“owns”) this Power Restore Policy setting, and it can be changed independently
with an IPMI command to the BMC. BIOS gets this setting from the BMC early in POST, and
also for the Setup Server Management screen.
6. Power Restore Delay
Option Values: Disabled
Auto
Fixed
Help Text:
Allows a delay in powering up after a power failure, to reduce peak power requirements.
The delay can be fixed or automatic between 25-300 seconds.
Comments: When the AC power resume policy (above) is either Power On or Last
State, this option allows a delay to be taken after AC power is restored before the system actually
begins to power up. This delay can be either a fixed time or an “automatic” time, where
“automatic” means that the BIOS will select a randomized delay time of 25-300 seconds when it
sends the Power Restore Delay setting to the BMC.
This option will be grayed out and unavailable when the AC power resume policy is Stay Off.
The Power Restore Delay setting is maintained by BIOS. This setting does not take effect until a
reboot is done. Early in POST, the Power Restore Policy is read from the BMC, and if the policy
is Power On or Last State, the delay settings are sent to the BMC.
Bear in mind that even if the Power Restore Delay is Disabled, there will still be a delay of about
20 seconds while the BMC itself boots up after AC power is restored.
/
NOTE
This Power Restore Delay option applies only to powering on when AC is applied. It has no effect
on powering the system up using the Power Button on the Front Panel. A DC power on using the
Power Button is not delayed.
The purpose of this delay is to avoid having all systems draw “startup surge” power at the same
time. Different systems or racks of systems can be set to different delay times to spread out the
startup power draws. Alternatively, all systems can be set to Automatic, and then each system
will wait for a random period before powering up.
7. Power Restore Delay Value
Option Values: [Entry Field 25 – 300, 25 is default]
Help Text:
Fixed time period 25-300 seconds for Power Restore Delay.