Hewlett Packard Enterprise Development LP

Hewlett-packard Development Company, L.p.

Michael Stearns

Chanh V Hua

Justin E York

Darren John Cepulis

Minh H Nguyen

David Paul Mohr

Raghavan V Venugopal

Andrew James Phelan

Masud M Reza

Mark Barlow Hammer

Timothy Majni

Brian Collum

Yang Wang

Sunil Gopalkrishna

Examples disclosed herein relate to power management in a blade enclosure. An intrusion detection mode is initiated by a baseboard management controller. Responsive to determining a power shortage in the blade enclosure, a stop clock pin is operated to control power consumption of a server in the blade enclosure. After a predefined time of determining the power shortage, a model specific register (MSR) associated with power settings of a Central processing unit (CPU) of the server is reconfigured. Reconfiguring the MSR comprises, identifying a power profile based on available power in the blade enclosure and modifying register states in the MSR based on the power profile via a baseboard management manager (BMC) of the server. Subsequently, operation of the stop clock pin is stopped.

Power management in a blade enclosure

Examples disclosed herein relate to initializing a fan speed of a computing device using a high-water value when a pre-runtime event occurs. A management controller (MC) receives sensor data from sensors of the computing device. A fan speed of a fan is controlled using a fan control value based on the sensor data. The fan control value is monitored to determine a high-water value of the fan control value. The high-water value is stored in a location that is accessible by a pre-runtime fan control engine of the computing device. In response to a pre-runtime event, the fan speed is initialized to a speed using the high-water value.

Pre-runtime fan control

Examples relate to edge device disablement. In some examples, edge device disablement includes an edge device including a processing resource in communication with a memory resource including instructions executable to receive an indication of a disablement trigger associated with the edge device and responsive to the indication, reprogram a printed circuit assembly (PCA) of the edge device to render mechanisms of the PCA inoperable.

Edge device disablement

In accordance with at least some embodiments, a system () includes an aggregator backplane () coupled to a plurality of fans (A-N) and power supplies (A-N) and configured to consolidate control and monitoring for the plurality of fans (A-N) and power supplies (A-N). The system () also includes a plurality of compute nodes (A-N) coupled to the aggregator backplane (), wherein each compute node (A-N) selectively communicates with the aggregator backplane () via a corresponding interposer board (A-N). Each interposer board (A-N) is configured to translate information passed between its corresponding compute node (A-N) and the aggregator backplane ().

Methods and systems for an interposer board

Methods, devices, and systems for passive impedance matching are provided. An example of a method of passive impedance matching includes provided a substantially equivalent impedance between a source and a load for three single-phase power supplies via a geometry of a busbar. The busbar can be coupled to the three-phase power supplies as the source and coupled to a plurality of electronic machines as the load.

Passive impedance matching

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Cypress, TX, United States of America

Michael Stearns