topic Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis in ONTAP Hardware

FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Wed, 04 Jun 2025 10:14:10 GMT

PSU1 FRU is not present in the chassis alert message was show on node A. I tried unplug and plug again the PSU, but alert still here. SP was tried reboot before, may i know what is the next step i can do. Many thanks.

logging as below:

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

WXXXXXXXXXX::> system health alert show
Node: WXXXXXXXXX-B
Resource: PSU1 FRU#042012002634
Severity: Critical
Indication Time: Mon Sep 06 07:02:21 2021
Suppress: false
Acknowledge: false
Probable Cause: PSU1 FRU is not present in the chassis 042012002634.
The nodes in this chassis are WXXXXXXXXX-A.
Possible Effect: The nodes in the chassis might not function
effectively or redundancy might be lost.
Corrective Actions: 1. Plug in PSU1 FRU correctly into the slot.
2. Refer to the Hardware specification guide for more information on the position of the field-replaceable unit (FRU) and ways to check or replace it.
3. Contact support personnel if the alert persists.

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

event show:

monitor.fan.failed: Multiple fans has failed.
monitor.fru.info.unreadable: The inventory information of FRU PSU2 is not readable.
monitor.fru.info.unreadable: The inventory information of FRU PSU1 is not readable.
callhome.c.fan.fru.fault: Call home for CHASSIS FAN FRU FAILED: Multiple fans have failed
monitor.temp.unreadable: The controller temperature (Midplane 1 Temp) is not readable.
monitor.temp.unreadable: The controller temperature (Midplane 2 Temp) is not readable.
monitor.temp.unreadable: The controller temperature (Midplane 3 Temp) is not readable.
monitor.temp.unreadable: The controller temperature (Midplane 4 Temp) is not readable.
monitor.fan.failed: Multiple fans has failed.
monitor.fan.failed: Multiple fans has failed.
monitor.fan.failed: Multiple fans has failed.
monitor.fan.failed: Multiple fans has failed.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Ontapforrum — Wed, 15 Sep 2021 08:48:44 GMT

Check this KB:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Systems/FAS_Systems/System_health_reports_environment_degraded%2C_but_no_hardware_failure

Try the solution suggested, if it doesn't work. Call Support.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Wed, 15 Sep 2021 09:09:28 GMT

Hi, thanks for your reply. But I was checked on system environment sensors show, node A PSU1 FRU state was fault.

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

WXXXXXXXX::> system environment sensors show

Node Sensor State Value/Units

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

WXXXXXXXXX-A

PSU2 FRU fault

MULTIFAULT

PSU1 FRU fault

MULTIFAULT

SP Status normal

IPMI_HB_OK

mSATA Status normal

mSATA Pres normal

PRESENT

Partner Status failed

PSU1 Present normal

PRESENT

PSU1 5V

init-failed

- mV - - - -

PSU1 12V

init-failed

- mV - - - -

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

NetApp also fault light on.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Ontapforrum — Wed, 15 Sep 2021 10:30:58 GMT

Have a look at this kB:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Systems/FAS_Systems/Power_supply_cannot_detect_power_off_correctly

Have a look at this, though it doesn't say your specific Model:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Systems/FAS_Systems/CHASSIS_FAN_FRU_FAILED%3A_Multiple_fans_have_failed_after_upgrading_SP_BMC

Parallelly, log a call with NetApp Support.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

andris — Wed, 15 Sep 2021 16:30:23 GMT

Reboot the BMCs on both nodes in the chassis.

Then update them to BMC 11.6.

The sensor reading failures can indicate issues with IPMI communication or BMC unhealthiness.

Create a case with Tech Support, ideally.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Thu, 16 Sep 2021 01:47:14 GMT

Thanks again, I will take a look for those KB.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Thu, 16 Sep 2021 01:48:46 GMT

Cool, Thanks andris. But is that any services impact druing BMC upgrade?

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

AlexDawson — Thu, 16 Sep 2021 01:57:13 GMT

BMC upgrades are generally non-disruptive - rebooting the BMC first will help ensure a smooth upgrade leading to non-disruptive activity. Command is "system service-processor reboot-sp -node nodename"

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Thu, 16 Sep 2021 02:04:07 GMT

Thanks for your reply Alex, i will try it later. I was saw one of KB said that to upgrade shelf firmware will help for this case. If i upgrade for shelf firmware also, did any services impact?

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

AlexDawson — Thu, 16 Sep 2021 02:13:12 GMT

Shelf firmware update is also generally non-disruptive, but it is important to perform the BMC reboot and BMC upgrade first.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Thu, 16 Sep 2021 02:20:48 GMT

That cool, thanks a again Alex. If after upgrade SP and shelf firmware the alert still exist, what should i do on next step?

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

AlexDawson — Thu, 16 Sep 2021 02:23:17 GMT

Open a case with the support center and start scheduling some downtime for a chassis swap, but I must stress this is very very uncommon.

The reboot and the upgrade should fix it.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Thu, 16 Sep 2021 02:36:18 GMT

I hope it can fix it this problom by upgrade, I try to contect with customer to upgrade those part first. BTW, thanks for your help again Alex.

Re: FAS2750 node A / system alert PSU1 FRU is not present in the chassis

Terry_Lui — Mon, 20 Sep 2021 06:35:16 GMT

Hi Alex, i tried to update SP and disk shelf firmware. but system environment sensors show still status on that as below:

PSU2 FRU fault
MULTIFAULT
PSU1 FRU fault
MULTIFAULT
SP Status normal
IPMI_HB_OK
mSATA Status normal
OK
mSATA Pres normal
PRESENT
Partner Status failed
PSU1 Present normal
PRESENT
PSU1 5V
init-failed
- mV - - - -
PSU1 12V
init-failed
- mV - - - -
PSU1 5V Curr

what should i do on next step?