Skip to main content
NetApp Response to Russia-Ukraine Cyber Threat
In response to the recent rise in cyber threat due to the Russian-Ukraine crisis, NetApp is actively monitoring the global security intelligence and updating our cybersecurity measures. We follow U.S. Federal Government guidance and remain on high alert. Customers are encouraged to monitor the Cybersecurity and Infrastructure Security (CISA) website for new information as it develops and remain on high alert.
NetApp Knowledge Base

VMware vSphere: Unable to restore VM's from .snapshot directory

Last Updated:

Applies to

VMware vSphere 6.7U3 


NetApp ONTAP stores volume snapshots in a .snapshot directory within the volume. 

  • This .snapshot directory, if made visible from ONTAP, can be browsed via the storage view in the vSphere WebClient or UI client
  • Customers can browse the .snapshot directory to restore files that they need from a NetApp volume snapshot

There is an issue seen in vSphere 6.7U3 when CBT (Changed Block Tracking) is enabled.  The symptoms of this issue are:

  • Customers cannot copy vmdk / -flat.vmdk files from the .snapshot directory via the vSphere UI or by cloning using vmkfstools -i
  • When attempting to clone or copy a vmdk / -flat.vmdk file from the .snapshot directory, the following error is encountered:

DISKLIB-LIB_CLONE   : Failed to clone : Invalid change tracker error code (5948)


2019-10-11T16:44:55.855Z info hostd[2100574] [Originator@6876 sub=DiskLib opID=esxui-abcd-1234 user=root] DISKLIB-CTK : Could not open change tracking 
 file "/vmfs/volumes/abcd123-abcd123
/.snapshot/daily.2019-10-11_0010/VM/VM-ctk.vmdk": Change tracking invalid or disk in use.

  • When CBT is disabled, and there is no -ctk.vmdk file, the copy operation is successful.


Scan to view the article on your device

Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support