Our environment consists of 2 ESXi v6 hosts and 2.4 TB of RAID 10 storage. Non-clustered. All storage is under one shared vCenter Datastore. The supporting hardware is a Dell VRTX with a pair of PowerEdge M630 blades.
The shared vCenter Datastore is a bit low of free storage capacity. And I need to spin up a final server VM that won't comfortably fit against it. The VRTX doesn't offer the ability to expand the storage array, so I cannot insert the new HDD's I have and increase its size. I'd have to rebuild the entire virtual disk, which is something I want to avoid. So instead I would need to insert the new HDD's and create a new Dell virtual disk for these new HDD's.
Here is my question. If I do create a second Dell virtual disk, can I add them to the existing vCenter Datastore? Or would I have to assign them as a second vCenter Datastore? And if I can indeed add them as an extent of the existing vCenter Datastore, what is the procedure for doing so?
I have documentation about how to get the new HDD's configured from the Dell VRTX angle. Just would like some pointers about handling things in vCenter!
Unless you really need all your capacity in a single datastore, I recommend you create a new datastore with the new virtual disk and avoid grow your datastore adding new extent.
Here are some thought about datastore extents: VMFS Extents - Are they bad, or simply misunderstood? - VMware vSphere Blog - VMware Blogs