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NetApp Knowledge Base

Power supply cannot detect power off correctly

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915
Visibility:
Public
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Category:
fas-systems
Specialty:
hw
Last Updated:

Applies to

  • FAS2720
  • FAS2750
  • ONTAP 9

Issue

  • When PSU1 is turned off, "environment sensors" is detected "PSU_OFF"correctly, but PSU2 cannot be detected even when PSU2 is turned off.
  • PSU1 power off

Example:

Cluster::> system node environment sensors show -type fru
Node Sensor                 State Value/Units Crit-Low Warn-Low Warn-Hi Crit-Hi
---- --------------------- ------ ----------- -------- -------- ------- -------
node-01
     PSU2 FRU              normal
                                         GOOD
     PSU1 FRU               fault
                                      PSU_OFF
node-02
     PSU2 FRU              normal
                                         GOOD
     PSU1 FRU               fault
                                      PSU_OFF
4 entries were displayed.

  • PSU2 power off

Example:

Cluster::> system node environment sensors show -type fru
Node Sensor                 State Value/Units Crit-Low Warn-Low Warn-Hi Crit-Hi
---- --------------------- ------ ----------- -------- -------- ------- -------
node-01
     PSU2 FRU              normal
                                         GOOD
     PSU1 FRU              normal
                                         GOOD
node-02
     PSU2 FRU              normal
                                         GOOD
     PSU1 FRU              normal
                                         GOOD
4 entries were displayed.

 

  • After PSU swap, PSU2 is detected correctly when it turned off, but PSU1 is not detected even when it is turned off.
  • PSU1 power off

Example:

Cluster::> system environment sensors show -type fru
Node Sensor                 State Value/Units Crit-Low Warn-Low Warn-Hi Crit-Hi
---- --------------------- ------ ----------- -------- -------- ------- -------
node-01
     PSU2 FRU              normal
                                         GOOD
     PSU1 FRU              normal
                                         GOOD
node-02
     PSU2 FRU              normal
                                         GOOD
     PSU1 FRU              normal
                                         GOOD
4 entries were displayed.

  • PSU2 power off

Example:

Cluster::> system environment sensors show -type fru
Node Sensor                 State Value/Units Crit-Low Warn-Low Warn-Hi Crit-Hi
---- --------------------- ------ ----------- -------- -------- ------- -------
node-01
     PSU2 FRU               fault
                                      PSU_OFF
     PSU1 FRU              normal
                                         GOOD
node-02
     PSU2 FRU               fault
                                      PSU_OFF
     PSU1 FRU              normal
                                         GOOD
4 entries were displayed.

 

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