52 IBM NeXtScale System Planning and Implementation Guide
Set Locator (Identify) LED to on, off, or blink
Turn off Check Log LED
Back up and restore FPC configuration to USB key; reset to default
Perform firmware update
Set date and time
Perform user account management
3.8 Power management
The FPC controls the power on the IBM NeXtScale n1200 Enclosure. If there is
sufficient power available, the FPC allows a compute node to be powered on.
The power permission includes the following two-step process:
1. Pre-boot (BMC stage) inventory power (standby power) is pre-determined
based on the node type.
2. Post-boot (UEFI stage) inventory power is a more accurate estimation of the
node’s maximum power usage that is based on power maximizer test. The
following values are generated:
– Maximum power usage value under stressed condition.
– Maximum power usage value under stressed condition when P-state is
capped at the lowest level.
The FPC uses these values to compare the total node power and total available
power to determine power-on and boot permissions.
3.8.1 Power Restore policy
By using the Power Restore policy, you can specify whether you want the
compute nodes to restart when a chassis AC power is removed and restored.
This is similar to the Automatic Server Restart (ASR) feature of many System x
servers. For more information about the Power Restore Policy, see “Power
Restore Policy tab” on page 189.
When Power Restore policy is enabled, if the compute node was powered on
before the AC power cycle, the FPC turns the compute node back on
automatically when power is restored.
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