VMFS and VMDK compatibility

Hi,

I've got a number of ESX 3.0.2-Update1 hosts which I'm going to be doing fresh installs of ESXi 4.1 onto. The 3.0.2 hosts are connected to external storage where the Datastores and VM's are stored. Is ESXi 4.1 compatible with the VMFS format/version and VMDK format/version of the existing data? Will the ESXi 4.1 hosts be able to mount the Datastores and power-up the VM's ok?

George.