Frequent Power-On Reset (POR) Events Recorded on ESXi Hosts

Products

• VMware vSAN

Issue/Introduction

• Power-On Reset events are observed in /var/run/log/vobd.log for multiple devices (naa.*) even after the associated storage controller and disks were replaced.

/var/run/log/vobd.log:

YYYY-MM-DDTHH:MM:SSZ vobd: Power-on Reset occurred on naa.################
YYYY-MM-DDTHH:MM:SSZ vobd: Power-on Reset occurred on naa.################
YYYY-MM-DDTHH:MM:SSZ vobd: Power-on Reset occurred on naa.################

Environment

ESXi 7.X
ESXi 8.X

Cause

One or more hardware components within the server hardware may be failing. Additionally, incompatible or unsupported driver and firmware combinations could also trigger Power-On Reset (POR) events.

Resolution

• Contact hardware vendor for failing hardware identification and replacement.
• Verify hardware, driver, and firmware compatibility against the Broadcom Hardware Compatibility List.