iSCSI IQN may have changed after working after upgrade to 7.0 U2

Last week I noticed some folks reporting that they had an issue with upgrades to 7.0 U2 from 7.0 U1. The issue they experienced was not being able to access their iSCSI Datastores any longer. I did some digging internally and found out there was a change in how we store the iSCSI IQN when the IQN is randomly created. … [Read more...]

Does vSAN Enhanced Durability work when you have a limited number of hosts?

Last week I had a question about how vSAN Enhanced Durability works when you have a limited number of hosts. In this case, the customer had a 3+3+1 stretched cluster configuration, and they wondered what would happen when they would place a host into maintenance mode. Although I was pretty sure I knew what would … [Read more...]

Can I vMotion a VM while IO Insight is tracing it?

Today during the Polish VMUG we had a great question, basically, the question was if you can vMotion a VM while vSAN IO Insight is tracing it. I did not know the answer as I had never tried it, so I had to test and validate it in the lab. While testing it became obvious that IO Insight and vMotion are not a supported … [Read more...]

VMs which are not stretched in a stretched cluster, which policy to use?

I’ve seen this question popping up regularly. Which policy setting (“site disaster tolerance” and “failures to tolerate”) should I use when I do not want to stretch my VMs? Well, that is actually pretty straight forward, in my opinion, you really only have two options you should ever use: … [Read more...]

How to login to the vCLS VMs!?

I was asked this question this week, how you can login to the vCLS VMs. Now before I share the video, I want to mention that I do not encourage people doing this, but as it is documented and supported I do want to provide a simple “how to” for how this works. If you want to login to the vCLS VM, maybe for … [Read more...]

Which vSAN policy changes will trigger a rebuild?

A couple of years ago I did a VMworld session with Cormac and we discussed the top things everyone should know about vSAN. One of the items discussed was which policy changes would trigger a rebuild. We tested the various situations and documented them. Two weeks ago a question around this was asked on a VMware … [Read more...]

Did you know vSphere 7.0 Update 1 also has a Skyline Health Check for vSphere Clustering Services?

I did not know this, but yesterday the PM for vCLS reached out to me and informed me that we now have a Skyline Health Check as well for vSphere Clustering Services. The funny thing is that I actually requested this health check to be added after having a discussion on the topic of vCLS with the PM. Very impressive how … [Read more...]

vSphere HA configuration for HCI Mesh!

Advertise here with BSA I wrote a vSAN HCI Mesh Considerations blog post a few weeks ago. Based on that post I received some questions, and one of the questions was around vSphere HA configurations. Interestingly I also had some internal discussions around how vSAN HCI Mesh and HA were integrated. Based on the … [Read more...]

Demo Time: How to delete the vCLS VMs

Advertise here with BSA As I have a bunch of questions around how you can delete the vSphere Cluster Service VMs (vCLS VMs) I figured I would create a quick demo. It is pretty straight forward, and it should only be used when people are doing some kind of full cluster maintenance. This demo shows you how to get the VMs … [Read more...]

vSAN HCI Mesh Considerations

Advertise here with BSA I did a vSAN File Services Considerations posts earlier this year and recently updated it to include some of the changes that were introduced for vSAN 7.0 U1. Considering vSAN HCI Mesh, aka Datastore Sharing, is also a brand new feature, I figured I would do a similar post. In this post, I am … [Read more...]