Storage devices require zeroedthick policy by default (1017666)
When a new virtual machine is deployed from a template on a VMFS-3 datastore, the eagerzeroedthick allocation policy is used. This results in a virtual disk that is fully allocated, and wasted storage on thin provisioned storage devices. The same problem exists when a virtual machine is migrated from one datastore to another using storage vMotion.
- In the vpxa.cfg file, add the following:
- Restart the VirtualCenter Agent on both source and destination ESX hosts.
- Run vmkfstools -D <absolute path to clone>/<cloned disk name>-flat.vmdk.
- Look for the output in the kernel log in /var/log to ensure that the tbz (to be zeroed) value is large.