Search the VMware Knowledge Base (KB)
View by Article ID

Attempts to deploy a VM OVF or to migrate a virtual machine to Virtual Volumes datastores fail if contents of potential config-VVol exceed 4 GB limit (2111421)

  • 0 Ratings


The configuration virtual volume, or config-VVol, contains various VM-related files. On traditional (non-VVol) datastores, these files are stored in the VM home directory. Similar to the VM home directory, the config-VVol typically includes the VM configuration file, virtual disk and snapshot descriptor files, log files, lock files, and so on.

On VVol datastores, all other big size files such as virtual disks, memory snapshots, swap, digest, and so on are created as separate virtual volumes.

Config-VVols are created as 4 GB virtual volumes. Generic content of the config-VVol usually consumes only a fraction of this 4 GB allocation, so config-VVols are typically thin-provisioned to conserve backing space. Any additional large files, such as ISO disk images, DVD images, images files, and so on might cause the config-VVol to exceed its 4 GB limit. If such files are included in an OVF template, deployment of the VM OVF onto VVol storage fails. If these files are a part of an existing VM, migration of that VM from a traditional datastore to VVol storage fails.


  • For VM migration. Before migrating a VM from a traditional datastore to a virtual volumes datastore, remove any excessive content from the VM home directory to make sure that config-VVol does not go beyond the 4 GB limit.
  • For OVF deployment. Because you cannot deploy an OVF template that contains excessive files directly onto VVol storage, first deploy the VM to a non-VVol datastore. Remove any excessive content from the VM home directory, and then migrate the resulting VM to VVol storage.

Additional Information

For translated versions of this article, see:

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.


  • 0 Ratings

Did this article help you?
This article resolved my issue.
This article did not resolve my issue.
This article helped but additional information was required to resolve my issue.

What can we do to improve this information? (4000 or fewer characters)

Please enter the Captcha code before clicking Submit.
  • 0 Ratings