Tech
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PowerShell command to check checkpoints in Hyper-V
Here is a quick PS command to check how many of your VMs have a snapshot: Get-VMCheckpoint |format-List -Property Name,Description It is always a good ideal to keep an eye on snapshots of your VMs.
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Behavior of CSVs in Hyper-V 2012
I have a few observations about CSVs in a Hyper-V 2012 cluster: 1. Online/Offline status in Disk Management. Take a look at the screenshot below. I was troubled by seeing the CSV offline. I thought there was a problem (not really). Here is how the cluster works: The CSV shows up as an online disk only on the cluster node which is managing is (or is the owner of that CSV). If you change the owner of that CSV to another node, the CSV disk will go offline on this node. However both nodes can still access the CSV via C:\ClusterStorage\vol2 2. Cannot map a drive to view CSV contents:…
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Hyper-V 2012 cluster installation troubleshooting
While installing a Hyper-V 2012 cluster I ran into some trouble. The cluster got installed successfully but a few things did not work properly. Live migration problems: Live migration does not work…well…sometimes. Sometimes it does work. So it behaves intermittently. I started a thread about it here. CSV not visible on all nodes. When using VMM console, the 2 CSVs I created are not available for placement of new or migrated VMs on all 3 nodes clusters in the cluster. Interestingly the CSV mount point under c:\ClusterStorage\VolumeX is visible on all nodes. Witness disk is visible on all nodes. Here are the steps I took towards solving the problem:
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Find which updates are installed using command line
To find out what updates have already been installed on a Windows 2012 server Core (like Hyper-V 2012), run this command: wmic qfe get hotfixid
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Bypass WSUS to install Windows updates
While trying to setup a Windows 2012 cluster (to be used by Hyper-V) I ran into an issue where the cluster validation tool failed. it said that the MPIO software versions were different on the nodes. Upon searching the net, I found the solution was to install all Windows updates. Unfortunately our WSUS server was not working properly. Every time I would run “Download and install Updates” manually on the Hyper-V Server 2012 (core) using the server configuration screen (no GUI) I would get a message that all updates are already installed. I had to bypass WSUS by running these commands: REG ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU” /v UseWUServer /t REG_DWORD /d 0…