Cannot place any Virtual disk file whose size is not an integral multiple of 1024KB (1MB) on the VVOL Datastore

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:
In the environment where the VVOL Datastore is used, you see these symtopms:

• When a virtual machine uses a virtual disk whose size is not an integral multiple of 1024 KB (1MB), Storage vMotion or cold migration to the VVOL Datastore fails.

You see an error similar to:

Error caused by file filename.vmdk.

• A virtual disk file whose size is not an integral multiple of 1024 KB (1MB) cannot be created on the VVOL Datastore by using vmkfstools command.

You see entries similar to:

Creating disk '<Virtual disk name>' and zeroing it out...
OBJLIB-VVOLOBJ : VVolObjCheckSize: Requested size (XXXXXXX) is not a MB multiple.
OBJLIB-VVOLOBJ : VVolObjDetermineSizeInMB: Requested size (XXXXXXX) is not a MB multiple.
Failed to create virtual disk: The requested size is not a multiple of 1MB (XXXXXXXXX).

 

Environment

VMware vSphere ESXi 6.0
VMware vSphere ESXi 7.0
VMware vSphere ESXi 6.7
VMware vSphere ESXi 6.5

Cause

The size of a virtual volume must be a multiple of 1 MB, with a minimum size of 1 MB. As a result, all virtual disks that you provision on a Virtual Volumes datastore must be an even multiple of 1 MB. If the virtual disk you migrate to the Virtual Volumes datastore is not an even multiple of 1 MB, extend the disk to the nearest even multiple of 1 MB.

Note: 
This issue is also observed when Virtual Machine files are migrated using Storage vMotion, from NFS/VMFS/vSAN datastores to vVol Datastores. 
You can use the Virtual Volumes datastores with traditional VMFS and NFS datastores and with vSAN. Virtual Machines created on NFS/VMFS/vSAN Datatores do not have the limitation of defining the virtual disk to be an exact multiple of 1 MB

Resolution

To resolve this issue, create a virtual disk whose size is an integral multiple of 1024 KB (1MB).

By using vSphere Web Client, you can create only a virtual disk whose size is an integral multiple of 1024 KB (1MB).

Note: This is a limitation on Virtual Volumes Datastores. [Virtual Volumes Datastores].

Additional Information

Virtual Volume Concepts