Error: "null - Underlying system error: com.vmware.vim.binding.vim.fault.CannotAccessVmDisk - Unable to access virtual disk" when increasing disk size in VMware Cloud Director

Products

• VMware Cloud Director

Issue/Introduction

• Unable to increase the disk size of a Virtual Machine in Cloud Director
• When performing this action you see an Internal Server Error and the following error is present in the Task Details:

null - Underlying system error: com.vmware.vim.binding.vim.fault.CannotAccessVmDisk - Unable to access virtual disk [Hard Disk Name] from the host. Either the host is disconnected from the datastore or has insufficient privilege.

Environment

• 10.3
• 10.4
• 10.5
• 10.6

Cause

This issue can occur if the Cloud Director database inventory of vCenter objects is not fully synchronised with vCenter and there is a mismatch between the inventories.

Resolution

1. Log into the Cloud Director Provider Portal as a System Administrator user.
2. Navigate to Resources > Infrastructure Resources > vCenter Server Instances.
3. Select the vCenter Server object and click Reconnect and Refresh.
4. Once the vCenter Server has reconnected again, expand the disk.