esx 5.1
1. First connect/create datatstore (vmfs 5.58) the datastore to the esx datastores
2. Then unmount the datastore
esx 6
3. Rescan datastores
4. Add a new datastore with a new partition (vmfs 5.81) on the same lun
esx 5.1
5. Mount the datastore again. (it can take a while before things are coming to life though. 5 minutes for me…
This has worked for me, it’s a struggle …
QNAP