Users Guide

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.
Dynamic Power Supply Engagement
Dynamic Power Supply Engagement (DPSE) mode is disabled by default. DPSE saves power by optimizing the power eciency of the
PSUs supplying power to the chassis. This also increases the PSU life, and reduces heat generation.
CMC monitors total enclosure power allocation, and moves the PSUs to Standby state. Moving the PSUs to standby state:
• Enables delivery of the total power allocation of the chassis through fewer PSUs.
• Increases the eciency of the online PSUs as they run at higher utilization.
• Improves the eciency and durability of the standby PSUs.
To operate remaining PSUs at their maximum eciency:
• No Redundancy mode with DPSE is highly power ecient, with optimal PSUs online. PSUs that are not needed are placed in standby
mode.
• PSU Redundancy mode with DPSE also provides power eciency. At least two supplies are online. One PSU powers the conguration,
while the other provides redundancy in case of PSU failure. PSU Redundancy mode oers protection against the failure of any one
PSU, but oers no protection in the event of an AC grid loss.
• Grid Redundancy mode with DPSE, where at least two of the supplies are active, one on each power grid, provides a good balance
between eciency and maximum availability for a partially loaded modular enclosure conguration.
• Disabling DPSE provides the lowest eciency as all six supplies are active and share the load. This results in lower utilization of each
power supply.
DPSE can be enabled for all three power supply redundancy congurations — No Redundancy, Power Supply Redundancy, and Grid
Redundancy.
• In a No Redundancy conguration with DPSE, the M1000e can have up to ve power supply units in Standby state. In a six PSU
conguration, some PSU units are placed in Standby and stay unutilized to improve power eciency. Removal or failure of an online
PSU in this conguration causes a PSU in Standby state to become Online. However, standby PSUs can take up to 2 seconds to
become active, so some server modules may lose power during the transition in the No Redundancy conguration.
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Managing and Monitoring Power