Windows Azure IaaS Host OS Update Demystified

Special thanks to Sri Harsha for reviewing this post!!  In this post we will look at: Why Windows Azure updates the host OS? How does the host OS update take place? What are availability sets? How does creating availability sets make your application highly available? Resource to help you create and manage highly available applications…

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Understanding ARM Assembly Part 1

My name is Marion Cole, and I am a Sr. EE in Microsoft Platforms Serviceability group.  You may be wondering why Microsoft support would need to know ARM assembly.  Doesn’t Windows only run on x86 and x64 machines?  No.  Windows has ran on a variety of processors in the past.  Those include i860, Alpha, MIPS,…


Windows Azure Learning Resources

Microsoft has loads of resources to help you learn, understand and leverage Windows Azure cloud platform. This is our effort of listing the resources that are available to help you learn about the Windows Azure architecture, security, features and implementation.   Architecture          Inside Windows Azure: The Cloud Operating System          Introduction to Windows Azure:…

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The [The selected task “{0}” no longer exists…] issue

Good morning AskPerf! Over the past couple of years, our customers have opened Support Cases and created forum posts  on the following error when opening Task Scheduler on Windows 7 clients and Windows 2008 R2 Servers: The selected task “{0}” no longer exists. To see the current tasks, click Refresh. After you click OK to…


Staying updated with all things Windows Azure

  Windows Azure is an ever evolving Microsoft cloud platform. You may find it tough to stay updated with all the latest features, current news and technical know how’s. To help you stay updated with all thing Azure, we have put together a list of websites, blogs and other resources that you can follow to…

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Unable to create a Storage Space in Windows 2012 R2 when using Windows Azure data disks

We recently determined Windows 2012 R2 Storage Spaces is incompatible with the virtual hard drives (VHDs) created by Windows Azure for use as data disks. Not only will the disks not enumerate in Server Manager, but they will also show up as CanPool=false when enumerated using Get-PhysicalDisk in PowerShell. The same VHDs work fine when…


Windows Server 2012/2012R2 – When Physical disks are attached to a virtual machine, Hyper-V Replica will have to be disabled

Hello Everyone, Many of you have come across issues with respect to Hyper-V replication in Windows Server 2012 and 2012R2. In this blog, we are going to address an occurrence that you might run into when enabling Hyper-V Replica. In Replica, you cannot enable a Virtual Machine with a physical disk attached to it (iSCSI,…


Activating virtual machines via Automatic Virtual Machine Activation in Windows Server 2012 R2

Hello, My name is Mayank Sharma and I am a Support Engineer in Windows Platforms Support Team. In this blog, I am going to discuss a very exciting addition to Windows Server 2012 R2, called as AVMA (Automatic Virtual Machine Activation). As the name suggests, this feature allows automatic activation of virtual machines running on…


The Compiler Did What?

I was recently investigating a crash in an application.  As I researched the issue I found a very old defect in the code that was only recently being exposed by the compiler.   The crash occurred at the below instruction because the ebx register does not hold a valid pointer.   0:001> r eax=d9050cf7 ebx=003078c0…


Heads up: Perfmon algorithm issue found/fixed

One of our Escalation Engineers has posted the following blog on the NTDEBUGGING page: Performance Monitor Averages, the Right Way and the Wrong Way Recently we have found that under some conditions perfmon will use the incorrect algorithm to calculate averages.  When reading from log files perfmon has been formatting the values, summing them, and…