I have ESXi 6.5 installed on a Dell R420 server. I was running 2x240GB SSD's in RAID 1 through my H710 RAID controller as my boot drive. Using the online data expansion capability of the RAID controller, I added an extra SSD and converted to RAID 5, increasing my capacity from 240GB to 480GB raw for the virtual disk exposed to ESXi.
When I try to expand the VMFS, I am getting an error message saying: Failed to expand VMFS datastore datastore1 - Cannot change the host configuration.
I scrolled through the VMkernel warnings log and it shows the following: 2018-03-06T03:14:03.847Z cpu19:69706)WARNING: Partition: 1751: naa.6c81f660e4d0590021adbd1b095018e0: in-use partition 2 can not be shrunk
Here are the steps I am taking:
Click on Datastore1
Click on Increase Capacity
Expand an existing VMFS datastore extent
Select the device
Select the partition I want to expand
Click Finish
Then I get the error above.
Some other things I noticed is that when it confirms the settings, it says it is creating a VMFS 6 partition, when it is starting out as VMFS 5. I tried shutting down all of the VM's on the machine and setting it to maintenance mode, but I still get the same error message.
I am not sure what I am doing wrong here. Any advice would be greatly appreciated.