NSX upgrade precheck erroneously reports "Check for sufficient free space on root partition of all hosts"

Products

• VMware vSphere ESXi

Issue/Introduction

• NSX precheck reports the following:
  • Check for sufficient free space on root partition of all hosts
  • This check will result in warning if free space in root partition on the node is less than 10%.
• ESXi Host shows no space issues and ample free space:
  

  # df -h
  
  vfat            ########       ########    #######   8% /vmfs/volumes/BOOTBANK1
  vfat            ########       ########    #######   8% /vmfs/volumes/BOOTBANK2

Environment

6.x
7.x

Cause

Host has changes pending that are preventing space from being adequately calculated, this is common with hosts with a high uptime

Resolution

Reboot of the ESXi host is required to process changes pending, upon reboot rerun the NSX precheck to confirm the issue is resolved

Additional Information

See also: NSX Upgrade precheck showing as failure in NSX UI, error ESXi host has less than 10% space on root partition.