Re: Why you should upgrade to vSphere 6.5 / ESXi 6.5

Recently I went to extend a volume on one of my guest systems and received an error requiring me to power off the system before extending the disk.

ErrorHot-extend was invoked with size (5368709120 sectors) >= 2TB. Hot-extend beyond or equal to 2TB is not supported. The disk extend operation failed: msg.disklib.INVAL

Good News – With vSphere 6.5 this is no longer a limitation.

Just one more reason why you should think about upgrading your VMware environment to the latest.

How a world champion of public speaking prepares for presentations

Toastmaters International world champion of public speaking Dananjaya Hettiarachchi reveals how he prepares for his award-winning presentations.

“If your presentation title tells the audience what you are going to talk about, you have a bigger chance of losing the audience. But if your title creates curiosity, you have won the audience over.” – Dananjaya Hettiarachchi



My VMware Certification Experience

I recently received my VCP6-DCV Certification from VMware by Passing the 2V0-621 Proctored Exam with Pearson VUE.

The Journey

For many years I have used VMware products. I distinctly recall getting my hands on VMware Workstation back in 2001, and it was truly an amazing tool. I could emulate Windows 3.1 and Windows 95, QNX, and even a few BSD environments, which I used to learn and troubleshoot issues.

Over the years I continued to use VMware line of products from: Workstation, ESX, GSX, and lastly the introduction of VirtualCenter.

Fast forward to now: The latest products have changed the landscape of running the data center, desktop provisioning, and the rapid deployment of test/development systems.

It was a no-brainer that I should obtain a certificate, but I never felt the need to. This changed when I was made a vExpert in 2017 this year, and that initiated my drive to do more with my knowledge and experience with the product. I now wanted to “prove” to myself, and perhaps others that I had what it takes to pass the exam and have an official recognition backing my previous and current experience levels.

VCP6-DCV Prerequisite

Obtaining the VCP6-DCV Certification requires a set of prerequisites. You need to meet all 3 requirements:

  • Attend an authorized training course
  • Pass the vSphere Foundations exam (2V0-620)
  • Pass the VCP6-DCV exam (2V0-621)


The most difficult part of my path to being a vCP was finding a reputable company to train with in addition to scheduling the time to attend training. The following may sound like a plug and do I assure you that I am not being compensated for writing about them.

I choose to train with a company by the name of StormWind as they offer exceptional VMware Certified professional training which is not only budget friendly, but doesn’t require travel as training is instructor lead; Live in real time and can be done from the comfort of your home or office.

The course I enrolled in was: VMware vSphere: Install, Configure, Manage [V6], with instructor: Vince Rightley.

This was a very engaging class which allowed for attendees to not only be instructed but to participate in supplemental discussions which I personally found to be beneficial. Labs were particularly useful as they allowed for students to get hands on.


vSphere Foundations exam (2V0-620)

After completion of my course I was now qualified to take the vSphere Foundations exam (2V0-620). Admittedly I rushed in to take this exam and FAILD my first attempt.

This was an eye opener that I was not fully prepared to take the test. What I discovered was that many of the resources can be found on VMware’s My Learn site. I would highly recommend following their guidance.

VCP6-DCV exam (2V0-621)

After successful passing the vSphere Foundations exam (2V0-620) it was time to start preparing myself for the VCP6-DCV exam (2V0-621)

VCP6-DCV exam Preparation

I have a few suggestions to make regarding preparation for the VCP6-DCV exam which I believe was beneficial to my success in passing.

Study the materials you obtained in your training course. Continue to leverage the study notes you made for yourself from the Foundations exam (2V0-620). Yes! You should have been keeping notes.

Seek out resources from VMware’s My Learn site. They are beneficial to your success.

Search ‘Google’ for VCP-DCV Study Guides. You will find many results many of great value

Practice Labs

I highly recommend that you gain access to a lab such as VMware’s Hands-On Labs (HOL) to get hands on to all the subject areas covered under the VCP6-DCA as you will need them. I built my own lab so I could have the full experience of building from scratch, to give me a full understanding of the environment.

Test many scenarios including areas of troubleshooting things which are broken (I had to break them, so I could fix).

Familiarizing yourself with acronyms and terms is also very helpful. Example:

Find yourself a practice test, and take it once a week to get yourself in accustom to taking tests; In my case it’s been a long time, and practice pays off.

Certification URL

Originally Posted on my LinkedIn

And, that’s it all folks.

–         Jermal

Docker hv-sock proxy (vsudd) is not reachable, Windows 10

Yes, I am playing (or trying to) with Docker.  My first step is to install Docker and get it up and running. So far I am confident that I have all the prerequisites, however Docker fails to properly start with the following error:

Docker hv-sock proxy (vsudd) is not reachable
at Docker.Backend.ContainerEngine.Linux.ConnectToVsud(TaskCompletionSource`1 vmId) in C:\gopath\src\\docker\pinata\win\src\Docker.Backend\ContainerEngine\Linux.cs:line 267
at Docker.Backend.ContainerEngine.Linux.DoStart(Settings settings) in C:\gopath\src\\docker\pinata\win\src\Docker.Backend\ContainerEngine\Linux.cs:line 251
at Docker.Backend.ContainerEngine.Linux.Start(Settings settings) in C:\gopath\src\\docker\pinata\win\src\Docker.Backend\ContainerEngine\Linux.cs:line 123
at Docker.Core.Pipe.NamedPipeServer.<>c__DisplayClass9_0.<Register>b__0(Object[] parameters) in C:\gopath\src\\docker\pinata\win\src\Docker.Core\pipe\NamedPipeServer.cs:line 47
at Docker.Core.Pipe.NamedPipeServer.RunAction(String action, Object[] parameters) in C:\gopath\src\\docker\pinata\win\src\Docker.Core\pipe\NamedPipeServer.cs:line 145

Currently I am researching possible solutions to fix, however non of the suggestions has worked for me. If you have suggestions please feel free to comment and let me know.

Here is a systeminfo of the system I am testing with:

OS Name: Microsoft Windows 10 Enterprise
OS Version: 10.0.15063 N/A Build 15063
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Workstation

System Type: x64-based PC
Processor(s): 2 Processor(s) Installed.
[01]: Intel64 Family 6 Model 30 Stepping 5 GenuineIntel ~2926 Mhz
[02]: Intel64 Family 6 Model 30 Stepping 5 GenuineIntel ~2926 Mhz

Total Physical Memory: 4,096 MB
Available Physical Memory: 2,755 MB
Virtual Memory: Max Size: 4,800 MB
Virtual Memory: Available: 3,167 MB
Virtual Memory: In Use: 1,633 MB

Tech Short: Capturing packets on Checkpoint

I’ve recently found myself capturing network traffic to troubleshoot reported issues. To successfully capture packets the use of tcpdump is required.  And while you may be familiar with using this tool, the use is slightly different on Checkpoint devices.

The devices in this reference is Checkpoint R77.30 and R80 devices.

To capture the correct network packets you must first disable Checkpoints SecureXL feature which is an acceleration solution that maximizes network performance of the Firewall.

To disable SecureXL, run the command:

fwaccel off

To check the overall SecureXL status:

fwaccel stat

Now that SecureXL has been disabled, continue to the capture steps below:

To capture packets, issue the following command:

tcpdump -s 0 -nni <interface_name> -w capture_file_name.pcap

Press Control-C (Ctrl C) to break the capture

Re-enable SecureXL, by running the following command:

fwaccel on

Retrieve the capture file and review using a tool such a Wireshark