Yes, vSphere 5 fully supports both VMFS3 as well as VMFS5. Unless you select to overwrite one of the VMFS3 volumes with the OS/Hypervisor installation you're fine.
André
Yes, vSphere 5 fully supports both VMFS3 as well as VMFS5. Unless you select to overwrite one of the VMFS3 volumes with the OS/Hypervisor installation you're fine.
André