Thick-provisioned disk to thin, in ESX 4.1

On ESXi 4.1 Copying virtual machines machines using Veeam FastSCP (Free version), if the copied machine disk was thin-provisioned, the pasted machine will be thick, so one solution is use the following command

vmkfstools –i <srcDisk> -d thin <dstDisk>

but don't forget to edit the <dstDisk> to indicate <dstDisk-flat>