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PowerEdge Product Group

Direct from

Development

PowerEdge MX Power Redundancy

Tech Note by:

Mark Evans

SUMMARY

Within this 4 page whitepaper

you will find core details

associated with the PowerEdge

MX redundant power features.

Specifically called out are the

grid power options and

associated redundancy features.

Power considerations are key to

a successful kinetic

infrastructure deployment and

planning for sufficient power and

redundancy

Discussed are the AC & DC

options associated with the

chassis deployment options.

Shared Power Infrastructure

MX7000 continues Dell EMC’s commitment to maximize performance-per-watt

through the consolidation of servers and network switchgear into a single high-

density chassis using 14th generation ultra-efficient power supplies and

dynamic power-efficient fans.

A shared power infrastructure takes advantage of the aggregation of multiple

servers by distributing power across the system without the wasted power

margin seen with individual monolithic servers and switchgear. Shared

resources allow for a common power policy across all servers in chassis.

The power distribution inside the PowerEdge MX7000 Modular Server System

consists of a 3+3 redundant power supply system, located in the rear bottom of

the chassis. Each power supply is rated at 3000W bringing total system

redundant power is approximately 9000W in a 3+3 power supply configuration.

Each power supply unit (PSU) is hot-swappable and are accessed from the

front of the chassis with power cables that can stay permanently attached to the

rear.

Figure 1 – PSUs Removable from the front of the chassis

Figure 2 – AC power connected in the rear of the chassis

The chassis power supplies are on a common output bus so that, if any PSU

fails, neighbor PSUs can pick up the load. Because of this, there are multiple

PSU redundancy modes supported for the MX7000

If there are two power grids feeding the data center racks, AC Grid Redundancy

policy can provide the greatest protection against both AC loss or PSU failure:

Summary of content (4 pages)

PAGE 1
Direct from Development PowerEdge Product Group PowerEdge MX Power Redundancy Shared Power Infrastructure Tech Note by: Mark Evans SUMMARY Within this 4 page whitepaper you will find core details associated with the PowerEdge MX redundant power features. Specifically called out are the grid power options and associated redundancy features.
PAGE 2
ndl • If Power Grid #1 fails, PSUs 4-6 will continue to operate from Power Grid #2 • If Power Grids #1 and #2 are operational, the system can suffer the failure of up to 3 PSUs in a 6-PSU configurations without affecting the operation of the chassis. Figure 3 – AC Grid Redundancy – Loss of a power grid allows for uninterrupted operation. Should either of these failure scenarios occur, the MX7000 will set a fault and can be configured to send notification of the issue.
PAGE 3
Direct from Development PowerEdge Product Group Power Redundancy Policy Selection Power Redundancy Policy selection can be changed via the MX7000 GUI. In the MX7000 web interface, click the Settings page.
PAGE 4
Front: • Health – Green indicates the PSU is Healthy, Amber designates a fault • AC Present – When illuminated, indicates that AC is detected and within tolerance. • DC Present – When lit, shows that PSU is supplying DC to the chassis. Rear: AC Present – When illuminated, AC detected Figure 6 – PSU Fault LEDs in green Troubleshooting Tips: • • • If the Rear AC Present LED fails to illuminate: o Check to make sure the PSU in the front of the chassis is installed in the correct slot and is fully seated.