You cannot go wrong with MkGuy outline, if you have any permissions you will need to recreate. Couple others things to keep in mind about online VMFS upgrade is that, old block size are retained and difference in block size will limit some VAAI features, the best practise is present a new lun and create new VMFS5 datastore and move VMs over using Storage vMotion. You generally want to keep VMware Tools in-line with the hypervisors.
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