topic Re: FAS3270 PSU numbering in ONTAP Hardware

FAS3270 PSU numbering

MartinR2 — Wed, 04 Jun 2025 13:59:17 GMT

Hi all,

I've got a FAS3270 with 2 power supplies. One of them (PSU2) is showing as degraded however the LEDs on both PSUs are green. Below is the error message:

:monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 2 is degraded: PSU2 Current is Unreadable

I want to reseat the PSU but unsure which PSU is PSU2. Looking from the back of the unit there is no numbering on the PSUs. So am I right in assuming PSU2 is the one on the right hand side?

Re: FAS3270 PSU numbering

COMITSUPPORT — Tue, 27 Feb 2018 14:47:38 GMT

You could try to turn on/off System FRU LEDs from service processor

Enter Diag mode:
SP filer> priv set diag
SP filer*> system fru list
SP filer*> system fru led show
SP filer*> system fru led set <number> on

If that doesn't work get the serial number of PSU from Service processor

1. SP filer*> system fru log show

The serial number is located in the rear side of the PSU (match the serial number)

hope it helps

Re: FAS3270 PSU numbering

andris — Tue, 27 Feb 2018 23:57:16 GMT

You could do all that... but you're right. PSU1 is on the left and PSU2 is on the right.