Under which two situations does the dead space reclamation feature VAAI Thin Provisioning offer the ability to reclaim blocks of a thin provisional LUN on a array? (Choose two)
When a virtual machine is migrated to a different datastore.
When a guest OS files in a virtual disk are deleted.
When a virtual machine is migrated to a different host.
When a virtual disk is deleted.
Page 188 from vsphere-esxi-vcenter-server-50-storage-guide.pdf
Disable Space Reclamation
Use the esxcli command to disable space reclamation on a thin-provisioned LUN.
When you delete virtual machine files from a VMFS datastore, or migrate them through Storage vMotion, the datastore frees blocks of space and informs the storage array, so that the blocks can be reclaimed. If you do not need thin provisioned LUNs to reclaim the freed space, you can disable space reclamation on the host.