Configure vCenter alarm for "Frequent PowerOn Reset Unit Attentions occur on storage path" VMkernel Observations(VOB) message

Products

• VMware vSphere ESXi
• VMware vCenter Server 8.0
• VMware vCenter Server

Issue/Introduction

ESXi detects repeated PowerOn Reset Unit Attention on the path of storage volume in a short period of time.

This is not expected behavior and indicates a possible problem with the SAN.

Example:
--/var/run/log/vobd.log
YYYY-MM-DDTHH:MM:SS:[scsiCorrelator] #############us:[vob.scsi.scsipath.por] Power-on Reset occurred on naa.###################

--/var/run/log/vmkernel.log
YYYY-MM-DDTHH:MM:SS cpu94:2098280)ScsiCore: 1823: Power-on Reset occurred on naa.###################

Environment

VMware vSphere ESXi 7.0
VMware vSphere ESXi 8.0

Cause

If it's plan to trigger the vCenter alarm for this event, it could be added by manually.

Resolution

Follow the steps mentioned below to register the alarm manually:

1. Navigate to vCenter Server -> Configure -> Alarm Definitions

2. Click Add

3. Input alarm name "Frequent PowerOn Reset Unit Attentions occur on storage path".

4. Choose the "Target type" as Hosts and click Next

5. In the "Alarm Rule1" page, Input "esx.problem.storage.connectivity.pathpor" as the trigger condition.

6. Select severity as "Show as Warning"

7. Optionally, you can configure email notification or SNMP traps or running any script whenever such alarm is triggered

8. Click Next

9. In the Review page, verify if the alarm rules is set correctly and make sure the "Enable this alarm" option is enabled.

10. Click CREATE.

Additional Information

Frequent Power On Reset Unit Attentions occur on path
https://knowledge.broadcom.com/external/article/318849/