ESXi upgrade pre-check fails due to degraded vSAN health

Products

• VMware vSAN

Issue/Introduction

Symptoms:

• Precheck / remediation for the ESXi patch update fails (8.0 U3e to 8.0 U3f).
  
  
  
  
• The host is already placed in maintenance mode with 'Ensure Accessibility'. 
  
  
• vSAN Skyline Health shows alert 'SCSI Controller is VMware certified'.
  
  

Environment

vSphere vSAN 8.x

Cause

Pre-check / remediation fails due to alert on vSAN health reported on the cluster --- 'SCSI controller is VMware-certified'.

Resolution

1. Validate if the SCSI controller is certified in Broadcom compatibility Guide using following link:
   
   vSAN I/O Controller
   
   
2. If it is, then silence the alert.
   
   (Cluster > Monitor > vSAN > Skyline Health > under alert 'SCSI Controller is VMware Certified > Click on 'Silence Alert').


3. Place one vSAN host at a time in maintenance mode with 'Ensure Accessibility' and run 'Remediate' to update the patch.
   
   (in vSphere Client > vSAN Cluster > Update > Click on '...' under 'Image Compliance'  >  Run 'Remediate')


4. Allow ESXi to complete the update.
   
   
5. Remove the host out of maintenance mode.
   
   
6. Repeat the above mentioned steps for other hosts in the vSAN Cluster.