Unable to create dummy disk, A general system error occurred: Invalid argument" During HCX Migration to an NFS datastore

Products

• VMware HCX

Issue/Introduction

Went preforming a HCX migration from any datastore to an NFS datastore we will get the following error on HCX:

Unable to create dummy disk, A general system error occurred: Invalid argument

and this error on Vcenter 

Environment

Vmware HCX

Vmware Storage

VMware Vsphere 

Cause

This error occurs When we are trying to migrate VM's that are larger than 4 Terabits to a NFS datastore, this is due because an NFS datastore has a limit of 4 terabits and anything bigger than will fail to create or moved to this datastore unless large file is is enable on the array 

Resolution

Enable Large file on the NFS array side, this will allow you to deploy a max disk or 16tb for this reach out to your NFS storage Vendor 

workaround 

Deploy vm's that have VMDK less than 4 TB. 

Additional Information

- Support for virtual machine disks larger than 2 TB in VMware ESXi