I was just reading some of the comments posted today and Marc Sevigny, one of the vSphere HA developers, pointed out something which I did not know. I figured this is probably something that many are not aware of so I copied and pasted his comment: Another thing to check if you experience this error is to see if you have [...]

Gabe asked the question on one of my recent posts if it made sense to enable Hot-Add by default and if there was an impact/overhead? Lets answer the impact/overhead portion first, yes there is an overhead. It is in the range of percents. You might ask yourself where this overhead is coming from and if that is vSphere overhead or… [...]

** 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 a question from one of my colleagues last week about Isolation Response and IP Storage. His customer has an ISCSI storage infrastructure and recently implemented a new vSphere environment. When one of the hosts was isolated virtual machines were restarted and users started reporting strange problems. What happened was that the HA Isolation Response was configured to “Leave [...]

I had a question last week about multi NIC vMotion. The question was if multi NIC vMotion was a multi initiator / multi target solution. Meaning that, if available, on both the source and the destination multiple NICs are used for the vMotion / migration of a VM. Yes it is! It is complex process as we need vMotion to [...]

I had a question today from someone who asked if there was any point in enabling SIOC (Storage IO Control) when you have NIOC (Network IO Control) enabled and configured. Lets start with the answer: Yes there is! NIOC controls traffic on a single NIC port level. In other words, when you have 10GbE NIC ports and vMotion, VMs and [...]

After I posted my article yesterday Jason Boche posted a comment about the reboot that was required according to the screenshot. I looked in to it and quickly realized that if I would alter my “descriptor.xml” I would not get this message. In other words, it depends on the package that is installed if a reboot is required or not, [...]