Tag Archives: Troubleshooting

vSphere 4 and Core Dumps (vmkdump)

Today I was reviewing my post on ESX Crash Dumps and found that well, for vSphere, it is quite broken. How? Well…
No /usr/sbin/vmkdump in ESX 4
As referenced in this KB article, vmkdump has been replaced with some additional flags on esxcfg-dumppart:

In ESX 4.X, esxcfg-dumppart is now used to extract the logs files.
The syntax [...]

What NICs Do I Have? – esxcfg-nics – VCDX Prep

As a plethora of my last posts suggest, I am spinning up study towards my VCDX. My first stop on that journey will be with the Enterprise Admin exam. Along the way I hope to share bits that I learn, review, and otherwise enjoy about the process. Today that is figuring out all manner of [...]

vSphere Host Died Abandon Ship! – vSphere vCenter Alarms & Actions

This came up recently on the VMware Virtualization group on LinkedIn. The question was essentially: “In the event of a host hardware issue, can I VMotion my VMs off the host and send a notification?” The answer is: “Most Certainly!” This can be done by setting up a vSphere vCenter Alarm and corresponding action. Let’s [...]

VMware Tools –default!

When was the last time you found yourself configuring VMware tools on Linux? Did having to incessantly press enter accepting the defaults drive you nuts too? I think I might be the last one to the game on this, but today I was stumbling through configuring VMware tools on a few Linux VMs. Stumbling, over [...]

Using AMD’s mcat.exe to Debug your PSOD MCE (Machine Check Exception)

"Sokath, his eyes opened" or roughly “Understanding”. So what does the Tamarian language have to do with PSODs or Machine Check Exceptions (MCEs)? Well, neither one of them make much sense, and need some understanding in order to translate them appropriately.
What is an MCE (Machine Check Exception)
A machine check exception, or MCE is [...]

Revisiting Lun Resigning (Bad things at 2AM)

The last time we touched upon LUN resigning, it was during an odd hour of the night. Looking back now, some interesting VMware KB articles have cropped up around this very topic.
First there is KB 9453805, which covers this process for VI3, seemingly from top to bottom, it also greatly expands on my post, [...]

vCenter Client on Linux – Single App RDP and You!

While I’d love to be able to claim I was clever enough to think of this on my own, that would straight up be lying (I really am not all that clever . Well, it would be more than lying, I’d not be giving proper credit to his awesomeness Rich Brambley at VM/Etc for [...]

A Quick PowerCLI Lesson – Digging for Info (Who Powered Off that VM)

I recently got a comment on a post I had done a while back on VMware tools and Time Sync. While the one-liners there may be useful, they don’t particularly explain how they got to the end results. With that in mind, today I hope to explain some of the logic used when you need [...]

Migrate Storage – “Failed to Connect to Host”

This one came at me from left field recently. The task at hand was to cold migrate one of a Virtual Machine’s disks from it’s old LUN, to a new one with some more breathing room. Simple enough, no? We’ve all done it a million times. What happened however, was that I received a “Error: [...]

Time Is Marching On… Disabling TimeSync, Completely.

Time is critical.
In VMs this criticality is even more pronounced. Time slips… CPU instructions go askew, and things get weird. That said, there are situations when you may wish to disable the built in VMware Tools Time sync service… completely. What do I mean by completely? Well, even with the tools time sync set to [...]

« Older Entries