VMFS5/6 datastores show 0B after host returned from reboot

Products

• VMware vSphere ESXi

Issue/Introduction

VMFS5/6 datastores show 0B after host returned from reboot.

A reboot or rescan didn't automatically mount the datastores.

Environment

ESXi 7.0.x

ESXi 8.0.x

Cause

Datastores that have been unmounted will remain unmounted after host returns from reboot or after a rescan is performed.

Following is logged after a rescan.

YYYY-MM-DDTHH:MM:SS info hostd[2101458] [Originator@6876 sub=Libs opID=esxcli-7b-d2f3 user=svcvc] GetUnmountedVmfsFileSystemsInt: Found 14 unmounted VMFS volumes

Resolution

These datastores will have to be manually mounted onto the host.