PowerEdge R6615 servers power supply error message

Posted by lescompa@reddit | sysadmin | View on Reddit | 7 comments

We recently deployed Dell PowerEdge R6615 servers (BIOS fully updated as of April 15, 2026). Currently, both power supplies for each server are connected to the same PDU (PDU-A), which is operating at 26% capacity. The alternate PDU (PDU-B) is already at 77% capacity, so my plan was to migrate one power cable per server to PDU-B as VMs are moved off legacy hardware.

I have several other servers configured with split power across PDU-A and PDU-B without any issues.

Issue:
When the new servers are connected to PDU-A, the following error appears:

"The power supply identified in the message must be supported by the platform. Generally, multiple power supplies in the server should have the same feature set and power rating."

Essentially the power supply is not useable, so no HA power.

Server-A complained, but then power normalized and shows the power supplies as being redundant. Server-B has the error and wont clear. Not an electrician and small company. Opened case with Dell previously but they had me plugging/unplugging, etc. According to AI, the PDU has plenty of capacity/plugs to accept the servers and plugging both power supplies into same PDU, although not optimal, it should work fine. AI points to the Dell servers as being the problem, but that doesn't seem right as this is new hardware.

Server A iDrac log (The power supplies are redundant.)

	Wed Apr 08 2026 14:56:10
	Power supply 1 is correctly configured.
	The input voltage for the Power Supply Unit PSU.Slot.1 is restored.
	The input voltage for the Power Supply Unit PSU.Slot.1 is not detected.

Server B iDrac log

Power supply 1 is incorrectly configured. Tue Apr 28 2026 17:30:30

The input voltage for the Power Supply Unit PSU.Slot.1 is restored. Tue Apr 28 2026 17:30:30

Power supply redundancy is lost. Tue Mar 31 2026 11:52:19

PDU-A

Eaton EMI104‑10 (L6‑30P, 24A, 5.76 kW)

Not sure it matters, during the initial setup of the servers via iDRAC, only a single power supply was plugged in. All bios updates, etc. occurred when only one power supply was connected to PDU-A. I didn't want to overwhelm the PDU with constant reboots, etc.

TIA

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glassmkr_@reddit

That error is iDRAC flagging PSU mismatch, not a PDU issue. Run racadm hwinventory PSU.Slot.1 and racadm hwinventory PSU.Slot.2 (SSH or the iDRAC racadm console) and compare Model, MaxOutputPower, and PartNumber. R6615 ships with multiple PSU SKUs (800W Titanium, 1100W Mixed-Mode, 1400W Platinum) and any wattage or feature set mismatch throws that exact wording. The single-PSU initial setup is unrelated.

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lescompa@reddit (OP)

Thank you all for your feedback. Here is the output of the 'racadm hwinventory':

[InstanceID: PSU.Slot.1]

Device Type = PowerSupply

DetailedState = Presence Detected|Configuration Error

DeviceDescription = Power Supply 1

EffectiveCapacity = 1100

FQDD = PSU.Slot.1

FirmwareVersion = 00.21.33

InputVoltage = 208 Volts

InstanceID = PSU.Slot.1

LastSystemInventoryTime = 2026-04-06T19:39:51

LastUpdateTime = 2026-05-06T13:30:31

LineStatus = High line

Manufacturer = DELL

Model = PWR SPLY,1100W,RDNT,LTON

PMBusMonitoring = Capable

PartNumber = 0FR0KXA02

PrimaryStatus = Error

Range1MaxInputPower = 1248 Watts

RedMinNumberNeeded = 1

RedTypeOfSet = N+1,Input Power Redundancy,Sparing

RedundancyStatus = Redundancy Lost

SerialNumber = TWLOK005810D80

TotalOutputPower = 1100 Watts

Type = AC

-------------------------------------------------------------------

[InstanceID: PSU.Slot.2]

Device Type = PowerSupply

DetailedState = Presence Detected

DeviceDescription = Power Supply 2

EffectiveCapacity = 1050

FQDD = PSU.Slot.2

FirmwareVersion = 00.21.33

InputVoltage = 116 Volts

InstanceID = PSU.Slot.2

LastSystemInventoryTime = 2026-04-06T19:39:51

LastUpdateTime = 2026-05-06T13:30:30

LineStatus = Low line

Manufacturer = DELL

Model = PWR SPLY,1100W,RDNT,LTON

PMBusMonitoring = Capable

PartNumber = 0FR0KXA02

PrimaryStatus = OK

Range1MaxInputPower = 1202 Watts

RedMinNumberNeeded = 1

RedTypeOfSet = N+1,Input Power Redundancy,Sparing

RedundancyStatus = Redundancy Lost

SerialNumber = TWLOK0058112F2

TotalOutputPower = 1100 Watts

Type = AC

Thanks

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glassmkr_@reddit

Alas, I was completely wrong 😄. The PSUs are identical (same Number 0FR0KXA02, firmware 00.21.33). Not a mismatch.

What's actually happening: PSU.Slot.1 is on 208V (high line) and PSU.Slot.2 is on 116V (low line). This PSU is autoranging and derates at low line, so EffectiveCapacity drops from 1100W to 1050W. iDRAC sees the pair has different effective capacities and flags 'Configuration Error' + 'Redundancy Lost' because the redundancy isn't truly equivalent. If the high-line PSU dies, the low-line one can only deliver 1050W.

Fix: get both PSUs on the same input voltage. Either both into 208V PDU-A or both into a 120V circuit. It's about input parity, not the hardware.

Heads up though, this contradicts your original framing that both were on PDU-A. Something must have changed in the cabling, or the inventory's showing a different state than you thought.

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