Try to use VMware Standalone Converter to import the disk as thin disk.
Andre
Is it possible without a VMware converter ?
-Abhay
Yes... but in this case the disks will be created in the default mode (thick).
PS: VMware Standalone Converter is free...
Andre
Thanks Andre. But can you let me know how can w do that without Converter to import OVF image even if the disk space is not sufficient on ESX.
-Abhay
if you don't have sufficient disk space to store the guest, then you shouldn't import anything until you free up atleast 20% of space on the destination LUN. Remember just because it's thin, you still need to space allocated to allow it to grow to it's maximum size.