VCF workflow adding new vSAN host to cluster fails at VSAN disk validation step with message pre-marked for capacity with size smaller than the disks used for cache.

Products

• VMware vSAN

Issue/Introduction

Symptoms:

- vSAN node is getting added to VCF cluster using API

- vSAN capacity disks are smaller size than vSAN cache disks

- vSAN capacity drives were tagged as capacity tier drive using esxcli 

esxcli vsan storage tag add -d naa.xxxxxx -t capacityFlash

- Workflow task fails with following error in VCF Manager GUI:

vSAN Disks Validation on the ESXi Host(s) failed: ESXi Host esxi25.example.net has the flash disks [naa.XXXXXXXXXXX, naa.XXXXXXXXXXX, ] pre-marked for capacity with size smaller than the disks used for cache.
Error
Message: vSAN Disks Validation on the ESXi Host(s) failed: ESXi Host esxi25.example.net has the flash disks [naa.XXXXXXXXXXX,naa.XXXXXXXXXXX] pre-marked for capacity with size smaller than the disks used for cache.
Remediation Message: Make sure that ESXi Hosts disks are eligible for use by vSAN.

Environment

VSAN 8.0

Cause

This is known issue.

Resolution

Ensure that vSAN capacity drive tag has been removed  for all capacity drives before adding node to VSAN cluster using VCF workflow

esxcli vsan storage tag remove -d naa.xxxxxx -t capacityFlash