Thinks to consider:
- How many VMs will there be on one such LUN and would the LUN queue depth be able to handle the IO
- Will the LUN be mirrored and do you need to perform DR tests on that LUN making LUN-snapshots? If yes, think about the snapshot size needed.
- What is the likelyhood of that one LUN failing for some odd reason and what would the restore time be from backup and will you then still meet your SLA?
- Can your system do autotiering and would it be better to mix disks in a LUN?