Replication job to VMware Virtual Volumes (VVols) fails with VDDK error: 7 (A file access error occurred on the host or guest operating system)

Veeam Backup & Replication
8.x, 9.x
Last Modified:


Replication job to a VVOL target will fail with the error below:

User-added image

Task.<VM name>.vm-<vm-ref> will contain following error:
[TIMESTAMP] <21> Info             [AP] (5e06) disconnecting
[TIMESTAMP] <55> Error                  [AP] (5e06) error: VDDK error: 7 (A file access error occurred on the host or guest operating system). Value: 0x0000000000000007
[TIMESTAMP] <55> Error          Failed to write to a virtual disk



Due to a change in VMware vSphere 6.0 Update 1, replication to VVol datastores is no longer possible with Veeam. This article will be updated in case more recent VMware vSphere updates fix this newly introduced issue.

Here is an official statement from VMware VDDK release notes:
Avoid creating snapshots for restore on VVol datastores. Due to Virtual Volume (VVol) implementation in the vSphere 6.0 release, VMware recommends against creating a snapshot (then reverting and deleting it) when restoring files on a VVol datastore. This is because writing to a non-leaf disk (such as a snapshot backing file) is considered a layering violation and throws an error on many VVol storage devices. Writing to the leaf disk of the snapshot is not a layering violation. The restore snapshot remains mandatory for SAN transport, which is not supported on VVol datastores anyway.


Replication job to VMware Virtual Volumes (VVols) is no longer supported.

More Information

Please be aware that we’re making changes which will restrict access to product updates for users without an active contract.


Rate the quality of this KB article: 
1.2 out of 5 based on 7 ratings

Couldn't find what you were looking for?

Below you can submit an idea for a new knowledge base article.

Report a typo on this page:

Please select a spelling error or a typo on this page with your mouse and press CTRL + Enter to report this mistake to us. Thank you!

Spelling error in text: