HP Onboard Administrator - Manual (Page 250)

Configuring the HP BladeSystem c7000 enclosure and enclosure devices 250
constraints. Power Capping is supported on any ProLiant server or blade that has an iLO management
processor and power measurement capabilities. Using Power Capping requires iLO 2 version 1.30 (or later)
firmware and an updated system ROM/BIOS.
Dynamic Power Capping
Dynamic Power Capping is a hardware-based technology that limits power consumption fast enough to
protect circuit breakers and cooling infrastructure. HP launched Dynamic Power Capping in December of
2008 with iLO 2 version 1.70. Supported servers contain an internal hardware circuit that monitors server
power consumption on a sub-second basis. If server power consumption approaches the power cap limit set
in iLO, the internal hardware circuit limits power consumption rapidly enough to protect PDU-level circuits
from over-subscription and prevent power-related server outages.
Dynamic Power Capping requires specific hardware on the system board. Dynamic Power Capping also
requires iLO 2 version 1.70 (or later) firmware and a system ROM/BIOS dated 10/1/2008 (or later). iLO
automatically updates firmware in the Dynamic Power Capping hardware power circuit.
Dynamic Power Capping is supported on the following BladeSystem server blades:
• BL260c G5 (Notes: 2)
• BL2x220 G5 (Notes: 2)
• BL460c G1 (Notes: 1 and 2)
• BL460c G5 (Notes: 2)
• BL465c G5 (Notes: 2)
• BL495c G5 (Notes: 2)
• BL685c G5 (Notes: 2)
• All G6 server blades
• All G7 server blades
• All G8 server blades
Additional information
• These systems require Quad-Core capable system boards to support Dynamic Power Capping.
• When implementing power capping for HP BladeSystem, HP recommends using Enclosure Dynamic
Power Capping set through the Onboard Administrator. To use Enclosure Dynamic Power Capping,
you must upgrade iLO 2 firmware to version 1.70 or later and are encouraged to update system ROM
to version 10/1/2008 or later. For some older BL460c Servers, the iLO firmware might not be able to
automatically update the Dynamic Power Capping hardware circuit. In these instances, Onboard
Administrator compensates for the absence of the internal hardware circuit and continues to guarantee
circuit protection.
Enclosure Dynamic Power Capping
Enclosure Dynamic Power Capping combines the power capping technology of the BladeSystem server with
a power balancing control algorithm in the Onboard Administrator to maximize the aggregate performance
of the enclosure. Enclosure Dynamic Power Capping protects your circuit breakers and maximizes your
performance.
Using Enclosure Dynamic Power Capping, you set a power cap for the entire enclosure. The Onboard
Administrator allocates individual limits to each participating server blade. The server blades manage
consumption to that limit. The Onboard Administrator continuously monitors power consumption
requirements for each server blade and continuously rebalances the individual limits to ensure that busy