How to: Fix vMotion issues because of Emulex driver logging

Recently I was troubleshooting an environment that had some weird issues regarding the centralized VMware Tools repository that we configured. I will not bore you with these details, they will get explained in a future blogpost. But I also had some issues regarding vMotion on this environment. At first I …

Resolving the mysterious and unknown issues with the PowerCLI Tag cmdlets!

Introduction to vSphere Tags VMware vSphere Tags is a way to attach metadata to VMware vCenter inventory objects to make it easier to find and recognize these objects. If you, like me, know about this functionality within vSphere, you know how useful this can be. In previous versions of vSphere, …

Using localcli on ESXi for troubleshooting

Just a small ESXi Pro tip this time. I recently had a host that was experiencing issues and the management services were unresponsive. This is a major problem for troubleshooting as the esxcli commandset won’t work anymore at this stage. Now by accident I came across a tip from the …

Ancient VMware View Scripted Reporting

A while ago I was working on a very very old VMware View environment. Yes, you’ve read this correctly, a VMware View environment. This is even from before the product was officially called “VMware Horizon View” back in 2015. So, the subject I was working on for the customer, but …

VMCI Sockets bug and missing MSR partition prevents VSS-aware backup (fixed)

Recently I had to do just that when a customer I recently on-boarded to our vSphere platform was having issues creating a VSS-aware backup. Even a quiesced snapshot command failed with an error. This issue took quite some time to investigate. And I was lucky enough to have a support …

How to fix Veeam VM replication error ‘The given key was not present in the dictionary.’

Recently I’ve been getting an error on one of my replication jobs in one of our Veeam environments. The error message was a bit vague, and to be honest, I’ve never seen it anywhere behore. The error message was: If you browse to your log file location, usually under: You …

How to fix: vSphere VUM: GUI error that prevents upgrades!

If you, as a vSphere Administrator, regularly update a vSphere environment you should be using vSphere Update Manager. vSphere Update Manager is the tooling that VMware made so that you don’t have to install patches through the command line on each host, or do updates on each host separately! And …

How to shrink VCSA logical volumes before an upgrade

I found that especially when you migrate Windows vCenter servers to the VCSA you might end up with a deployment size that is less than optimal. Some people say; don’t worry, it’s just thin provisioned. But I’m an old-school guy and I like to keep things neat and simple. The …

Remediating Host with ESXi 6.5 VUM “The host returns esxupdate error code:15 error

The other day I was patching a couple of hosts on one of our environments. All worked out fine until I got one host that refused to update from vSphere ESXi 6.5 U1 to ESXi 6.5 U3. Throughout the day this host actually gave me loads of different errors. In …

Slow boot times ESXi with (p/v)RDM’s easy fix

Recently we have been having (extremely) slow boot times for a couple of hosts that we’ve been using for a new customer. We actually didn’t really notice this in the beginning, until we added hosts to the existing cluster and the reboot for that host took over 3 hours! The …