Appears this is a known issue due to CBT  (Changed Block Tracking) http://xtravirt.co.uk/vsphere-vm-%E2%80%9Cfreezes%E2%80%9D-during-removal-snapshot vSphere: VM “freezes” during the removal of a snapshot Author(s): (ICT-Freak.nl) Arne Fokkema First Published: 26 April 2011 UID: XD10406 By Arne Fokkema – ICT-Freak.nl If your VM is running on a NFS datastore and Changed Block Tracking (CBT) is enabled, you […]