System does not auto restart after AC power loss - Lenovo System x3850 X6 (6241)

Resolving The Problem

Source

RETAIN tip: H214531

Symptom

When AC power is lost and then returns, the system does not automatically restart and return back to its previous operational state per selection in setup.

Affected configurations

The system may be any of the following Lenovo x86 servers :

• System x3850 X6, type 6241, any model

This tip is not software specific.

This tip is not option specific.

Solution

This is a permanent limitation of the system.

Workaround

It is strongly recommended that the user installs an Uninterruptible power supply (UPS) in order to prevent the sudden loss of AC power to the system and thereby prevent this event from occurring.

Additional information

This issue occurs due to a signal race condition of the system which controls the automatic power on into the last known operational state.

The user needs to provide a remote system level auto-recovery or set an auto-restart mechanism to follow the loss of AC power. Alternatively the user can implement a UPS, which will prevent the loss of AC power to the system and thereby prevent this event from occurring.