RSS

Windows Anniversary update broke my network and start menu

The case against Windows Anniversary update goes on (read the comments):

http://www.infoworld.com/article/3104389/microsoft-windows/the-case-against-windows-10-anniversary-update-grows.html

Two days ago, I was forced to receive the Windows Anniversary update like many other people. And like a lot of folks, I really need my computer at the point in time but the screen just asks me to wait as Windows is update… what can we do?

Fast forward, the update completed and machine reboot. Logged in to my machine and 3 major items did not work:

  • Start menu
    • There was no response when clicking on the Windows start button or the search button after the update. In other words, I have no view of my installed applications or access to launch any applications other than those already in the task bar. Of course, I could still run the applications directly via command prompt or the file explorer
  • Network
    • My network stopped working. When I looked into the network adapters, I could see my wireless and LAN adapter. I normally disable the wireless and use the LAN. However, I also had Hyper-V running and the virtualised adapters had disappeared. Those were the ones used for network connectivity.
    • I could not find the adapters in device manager and found that the update had removed Hyper-V without proper uninstallation obviously.
    • By removing Hyper-V, the virtualized adapters where also removed, leaving my physical adapters with no bindings to any protocols or services
    • By rechecking the protocols, e.g. IP4 and network services, network connectiviity came back.
  • Action center
    • When initially troubleshooting the network issue, I tried to turn on my wireless adapter to configure it for my network. Sadly, because the action center will not launch, I could not view the network available to connect my wireless adapter to. Of course, this can be done via command line, but what about the end-users?
    • I also cannot clear the notification icon on the tray as action center will not launch.

After readig a bit about all the problem, I decided to try creating a new profile to see if it will solve at least the start menu and action center issue. However, that did not work.

Luckily, Windows offered back out and recovery option which worked for me. So I managed to recovery my Windows and got back my previous version.

 

 
Leave a comment

Posted by on September 26, 2016 in General, Windows

 

Fixed: “The security database on the server does not have a computer account for this workstation trust relationship”

I have been playing with my own little AD domain sandbox in hyper-V and came across this error when trying to logon to a domain member server using an account with Domain Admin rights:

“The security database on the server does not have a computer account for this workstation trust relationship”

This is strange because my setup is not very complicated, just one forest DC, one domain DC and a member server. Of course, the first thing I tried is to reset the computer account and also to rejoin the server to the domain, which didn’t work Read the rest of this entry »

 
Leave a comment

Posted by on July 20, 2016 in Windows

 

Tags:

ESXi host performance issues and the importance of thermal paste

A totally interesting read on how the team in VMware resolved an issue with a non performing HP blade. The final take away from this is:

  • Thermal paste really can impact performance!
  • HP Active Health System logs should (but don’t) include when CPU’s clock down to prevent overheating.
  • CPU clock throttled error message don’t appear in ESXi logs.

http://www.vmspot.com/esxi-host-performance-issues-and-the-importance-of-thermal-paste/

 

 
Leave a comment

Posted by on July 1, 2016 in Operations, vmware, Windows

 

Tags: ,

Unswapping swapped mem in Vsphere 6.0

An interesting article from yellow bricks on an undocumented feature in Vsphere 6.0 to allow you to swap out memory after contention is long gone. Previously, you either had to power cycle or vmotion your VM to get back memory into RAM.

http://www.yellow-bricks.com/2016/06/02/memory-pages-swapped-can-unswap/

However, my advice is always to avoid over-commit of memory as the last resort and manage the size your VM to avoid over-commit whenever possible. Ballooning and memory swapping into disk is one of the most performance hit activities that can happen to your environment compared or over-committing on CPU.

 

 

 
Leave a comment

Posted by on June 3, 2016 in vmware

 

Tags: ,

VMware: Goodbye to the fat client

For the longest time VMware administrators have been using the C# VSphere clients or “fat client”. Over the years, it continues to plague us with hidden confirmation dialog boxes, error dialog boxes that pop-up continuously, version incompatibilities on the same computer and application crashes.

Worst of all are the need to test, package and supply new versions of the client whenever the infrastructure is upgrade. Its not a big deal if the only persons to use it are your own VMware administrators. But in big organisation with VDI in the mix, you need to hand off new versions to desktop support and even end users themselves. Worst of all, is the need for a clean uninstall of the older versions before the new versions can be installed or else you may end up with knackered computer which won’t run either versions. Read the rest of this entry »

 
Leave a comment

Posted by on May 20, 2016 in vmware

 

Tags: ,

vCenter Server Appliance 6.0 with vPostgres

Good news to some folks is that vCenter Server Appliance 6.0 is now on par with its former enterprise siblings, namely, vCenter on Windows + SQL or vCSA with Oracle.

For big enterprises, it is very common to install vCenter into a Windows machine and setting up the databases with your DBA admins on SQL. One of the main problem with this is the process of getting a database or expanding databases when you run of out of space. It can take time to setup a new vCenter or you often end up expanding the databases with an incident ticket. The other problem is that because the SQL database is managed by the DBA team, you are dependent on that team’s effectiveness to keep your vCenter running. There are times within busy periods of a DBA teams where you might find the vCenter service stopping or failing due to a stuck job or running out of space on SQL but your team was not alerted in time causing an incident.

Thus running your own vCSA, if you have a big enough cloud team, is probably a better solution in keep the lights up for your vCenter server, especially if they are consumed by VDI/Desktop teams and workflow applications like Orchestrator.

Of course, the challenge for Windows folks like me is having to master a new Linux OS and vPostgres database for optimization and troubleshooting. But these are alwasy good challenges to have.

http://blogs.vmware.com/vsphere/2016/03/getting-comfortable-with-vpostgres-and-the-vcenter-server-appliance-part-1.html

 
Leave a comment

Posted by on March 23, 2016 in vmware

 

Tags: , ,

VMware: Finally a better maintenance mode sequence

I guess most of us have had the experience of getting an ESXi host into maintenance mode and finding that it got stuck with one last VM. When you look into host, you also see shutdown VMs and templates still hosted by this ESXi and you have to manually move them out before trying to get that last VM fixed so that you can get into the maintenance mode.

Great news with the vSphere 6.0 Update 2, now the order of evacuation for host going into maintenance mode is improved! Specifically:

Starting with vSphere 6.0 Update 2, when a host enters Maintenance Mode the host will evacuate all the powered off VMs and templates first, and then proceed to vMotion all the powered on VMs.

http://blogs.vmware.com/vsphere/2016/03/maintenance-mode-improvements-in-vsphere60u2.html

 
Leave a comment

Posted by on March 18, 2016 in vmware

 

Tags: ,