With a BOSS card in the server, a Dell Utility partition may be configured on the BOSS card devices, but usually not on additional HDDs/RAID. So I assume that the VMFS partition that you've created is the only partition on the RAID VD, and it's likely GPT formatted. To find out, run eiter run partedUtil getptbl /vmfs/devices/disks/<device-name> from the command line, or simply check the settings in the ESXi Hosts's Web Client. Here's an example from my lab server:
Yeah, I see that the datastore2 storage space (which is connected to the PERC) is one partition, 1.09TB formatted GPT.
There is another datastore, datastore1. This was there when I logged into ESXi for the first time. It is listed as "Dell BOSS" and 216GB is size (although it's only 1% full atm.) Not sure what's on it.
