Users Guide

Extended Power Performance
Extended Power Performance (EPP) mode enables allocation of 30% additional power in a conguration of six Power Supply Units
(PSUs), to the M1000e chassis, than the redundant power in a Grid Redundancy conguration using 3000 W AC PSUs. However,
the power allocated to servers is automatically reduced in the event of an AC grid failure or a PSU failure, so that the servers are not
powered o. A maximum of 2700W power can be allocated to support chassis with high-end congurations.
By default, the EPP feature is enabled on six 3000W AC power supply conguration. You can view the current setting, disable and
enable this feature using both the Web interface and the Command Line interface.
EPP feature allows power allocations only when:
• Power is congured for Grid redundancy.
• There are six PSUs that are of 3000W AC type.
• System Input Power Cap is higher than 13300W AC (45381 BTU/h).
The power gained using EPP mode is available for increasing the server performance. When compared with a six 2700W AC PSU
conguration, the additional power available on a six 3000W AC PSU conguration with Enhanced Cooling Mode for fans enabled
and active is 723W. When compared with a six 2700W AC PSU conguration, the additional power available in standard fan
congurations mode, is 1023W.
The EPP additional power available is 2700W, which can be used to increase server performance only.
The EPP mode can be enabled only when the following power features are disabled:
• Max Power Conservation Mode (MPCM)
• Dynamic Power Supply engagement (DPSE)
• Server Based Power Management (SBPM)
• Server Performance Over Power Redundancy (SPOPR)
Trying to enable EPP when any of the four features, MPCM, DPSE, SBPM or SPOPR, is enabled results in display of a message. The
message prompts you to disable these four features before Extended Power Performance mode can be enabled. When Extended
Power Performance mode is enabled, any of these other three features, DPSE, SBPM or SPOPR, cannot be enabled. You are
prompted to disable Extended Power Performance feature before any of these three features can be enabled.
Firmware downgrade to version earlier than CMC 4.5 rmware is blocked by the current rmware when the chassis is equipped with
3000W AC PSUs. The reason for this is that CMC rmware versions earlier than CMC 4.5 do not support 3000W AC PSUs.
Default Power Congurations With Extended Power Performance
Default Power Congurations on the Chassis when EPP mode is enabled or disabled:
• On 3000W AC six PSUs conguration with Grid Redundancy policy:
EPP Enabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• Running the commandracadm racresetcfg on 3000W AC PSU conguration, resets the power congurations to the
following values:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On 3000W AC with less than six PSUs conguration:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On 2700W AC PSU conguration:
EPP Disabled – DPSE Disabled, SPOPR Enabled, MPCM Disabled, SBPM Disabled
• Using racadm racresetcfg on 2700W AC PSU conguration, resets the power congurations to the following values:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On a Fresh Air enabled chassis congurations, 3000W PSUs are displayed as 2800W and EPP is not supported.
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