This guide has been created to provide you with the ins and outs of Dell PowerStore Metro Volumes.
It might all seem logical, but some small things were insightful, so I thought, let’s write a small blog about this.
Part 1 will start with the most basic of tasks: Create a Dell PowerStore metro volume.
So some info about the test environment, The solution has two PowerStore 3200T appliances.
These were patched to the latest PowerStoreOS version 3.6.0.0 (which supports the Metro Witness now).
The hosts connected with the SAN environment are running VMware vSphere 8.0
Regarding replication connectivity, the replication is only supported over TCP (iSCSI and NVME/TCP).
Index
This guide will be split up into multiple individual blogs, to keep them short and readable.
Dell PowerStore & vSphere – Metro Volumes ins & outs – Creation
Metro volume creation
So let’s create a dummy volume that we can utilize to test with. This is done on the Dell PowerStore volume overview.
During the creation, we will make it a Metro volume as we assign a protection policy to the volume.
Next, you have to map this to a target. We will utilize an ESXi node from the test cluster.
So next we need to configure the Metro volume. On the top select Storage > Volumes > select the “dummy” volume we just created.
Click on the Protection tab in the middle of the screen and click on the Metro tab.
So the creation of a metro volume is very straightforward. First, click on the “Configure Metro volume”
If you already have configured a remote target (remote powerstore) then it will show in the drop-down. Otherwise, create a new target:
Enter the details of the remote system / powerStore, after submitting the new remote system. It should be listed in the drop-down.
Once the remote system is selected, the volume is created and the replication to the remote system is initiated. 
After some time the replication will be completed and you should see a green icon, indicating the volume is in a normal state (active-active).
With this done, your test volumes are active and fully redundant. As you can see we also are utilizing a 3rd site to host a Witness VM.
This will provide additional protection between the 2 powerstores, in the event of split-brain scenarios.
A comprehensive list with all possible failure scenarios and what the expected behavior would be can be found here:
https://infohub.delltechnologies.com/nl-nl/l/dell-powerstore-metro-volume-1/failure-scenarios-with-witness/
I hope this guide was helpful in any way!
Thanks for reading