Dell POWEREDGE M1000E - Manual (Page 203)

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 lower than CMC 4.5 firmware is blocked by CMC 4.5 firmware when the chassis is
equipped with 3000W AC PSUs. The reason for this is that CMC firmware versions earlier than CMC 4.5 do not support
3000W AC PSUs.
Default Power Configurations With Extended Power Performance (EPP)
Default Power Configurations on the Chassis when EPP mode is enabled or disabled:
• On 3000W AC six PSUs configuration with Grid Redundancy policy:
EPP Enabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• Running the commandracadm racresetcfg on 3000W AC PSU configuration, resets the power configurations
to the following values:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On 3000W AC with less than six PSUs configuration:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On 2700W AC PSU configuration:
EPP Disabled – DPSE Disabled, SPOPR Enabled, MPCM Disabled, SBPM Disabled
• Using racadm racresetcfg on 2700W AC PSU configuration, resets the power configurations to the following values:
EPP Disabled – DPSE Disabled, SPOPR Disabled, MPCM Disabled, SBPM Disabled
• On a Fresh Air enabled chassis configurations, 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
efficiency 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 efficiency of the online PSUs as they run at higher utilization.
• Improves the efficiency and durability of the standby PSUs.
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To operate remaining PSUs at their maximum efficiency:
• No Redundancy mode with DPSE is highly power efficient, with optimal PSUs online. PSUs that are not needed are
placed in standby mode.
• PSU Redundancy mode with DPSE also provides power efficiency. At least two supplies are online. One PSU powers
the configuration, while the other provides redundancy in case of PSU failure. PSU Redundancy mode offers
protection against the failure of any one PSU, but offers 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 efficiency and maximum availability for a partially loaded modular enclosure configuration.
• Disabling DPSE provides the lowest efficiency as all six supplies are active and share the load. This results in lower
utilization of each power supply.
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