When adding/replacing disks in a vSAN cluster a new unhealthy disk-group is observed.

Products

• VMware vSAN

Issue/Introduction

When adding/replacing disks in vSAN cluster a new unhealthy disk-group is observed after the "new disk" has been added to the host. 

 

Environment

VMware vSAN(All Versions)

Cause

The Disk/s that have been added to the host as a replacement/additional disk were removed from a pervious vSAN host with out proper decommissioning.  This left all pervious vSAN partitions/data intact on the disk and this can lead to seeing additional disk-groups and/or missing and inaccessible objects. 

Resolution

When utilizing drives from a previous vSAN host to be used elsewhere please ensure you have followed KB Permanently Decommission a node from a vSAN Cluster to ensure that all disks have been removed correctly and no vSAN partitions/data remains. 

If the drives have been added to a vSAN cluster ensure the host is in maintenance mode and remove the offending disk-group this will wipe the disk and allow for either the creation of a new disk-group / adding the disk to an existing disk-group. 

If you have any additional questions, or concerns regarding this issue please open a case with VMware Support for further investigation.