vSAN disks missing from hosts after datacenter maintenance

Products

• VMware vSAN 8.x

Issue/Introduction

The below vSAN Health Service alerts are observed after planned cluster maintenance:
vSAN Health Service - Physical Disk Health - Operation Health

vSAN Health Service - Data Health - vSAN Object Health

VMs show as inaccessible/disconnected in vCenter

Out of band/KVM for the servers shows no hardware issues with the disks

 

Environment

VMware vSAN (All Versions)

 

Resolution

Validate all the controllers and disks are compliant with the VSAN HCL as well as drivers/firmware are running a valid combination.

Follow step 2 of KB Troubleshooting vSAN OSA disk issues

2.) Based on the cause of the disk failure, an activity might need to be done on the Host
Examples: Reboot of Host, replace/re-insert the failed disk, or recreate Disk Group.
As Best Practice, place the Host in Maintenance Mode with "Ensure accessibility" before proceeding with any activity
(Note: Run the Data Evacuation precheck, to understand if it will require to migrate data or not).

Recreate Disk Group should only be done once verification of data integrity and availability of any problematic or inaccessible objects are properly vetted.

If the above steps does not correct the inaccessible objects, open a case with Broadcom Support for further assistance to prevent any permanent changes that could potentially lead to data loss.