Bilal Hashmi wrote a nice article about HA today and in this article he asked a couple of questions. As I think the info is useful for everyone I decided to respond through a blog article instead of by commenting. Let me start by saying that in general HA should never be disabled. The later versions of vSphere have a [...]

** Disclaimer: This is for educational purposes, please don’t implement this in your production environment as it is not supported! ** After my article this week about (ab) using the SRA provided through Site Recovery Manager to fail-over any LUN I expected some people reaching out to me with additional questions. One of the questions which came in more than once was [...]

** Disclaimer: This is for educational purposes, please don’t implement this in your production environment as it is not supported! ** Last week I received a question and I figured I would dive in to it this week. The question was if it is possible to fail-over LUNs using VMware Site Recovery Manager (SRM) which are not part of the Cluster which [...]

I had the question today what happens to a powered off VM when the host they are registered against fails? This customer always has multiple powered off VMs and was afraid their VMs would show up as orphaned. I was pretty confident that the VM would be re-registered against one of the remaining hosts in the cluster, but I validated [...]

I wrote an article about the scenario where all host fail, due to for instance a power outage, and how HA responds to it. I had a question today if this was still valid with vSphere 5.0. I figured it wouldn’t hurt to describe the steps that vSphere 5.0 takes. Power Outage, all hosts down Power on hosts Election process [...]

Last week at VMworld and on the VMTN community I had a couple of questions around resource management and HA Admission Control. It appears people were using HA Admission Control for managing resources within their environment. In other words, the amount of VMs that HA would allow you to restart would be leading for managing resources. But is that what [...]

Last week I did an article about Datastore Heartbeating and the prevention of the Isolation Response being triggered. Apparently this was an eye-opener for some and I received a whole bunch of follow up questions through twitter and email. I figured it might be good to write-up my recommendations around the Isolation Response. Now I would like to stress that [...]