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How to fix replica which has stopped syncing
So the status of your Hyper-V replica shows that replication health is critical and if I click resume replication, it says replicating changes >> and after a few moments >> failed. There is no other option to fix this issue. Try these steps: (I use Hyper-V manager for this procedure) 1. From the primary site, remove replication using “remove replication” option. This will leave the replica VM on the DR site intact. 2. Now, on the DR site, remove replication. If you look at this replica VM inside VMM, you will see that now it has become a regular VM. It looks like a regular server instead of a server…
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How to re-sync replication with an old initial replica on USB drive
I ran into a situation where a large VM had its replication enabled, and the initial replication (IR) sent to a USB drive. Then IR was imported on the DR site. Everything was fine but later on, for one reason or another, the replica was deleted. At this point you have the option of recreating another IR to a USB drive, sending that USB drive to your DR site, importing the new IR again. All that, of course, will take quite a lot of time. The alternative is to import the same old IR on the USB drive (assuming it is still there at the DR site) and letting the…
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Fix “missing” VM status in VMM
OK so here is a tricky problem with an easy fix. Sometimes, in SC VMM 2012 some of my VMs are shown as “missing”. I cannot do anything to them using VMM. An easy fix is to fire up FCM (Failover Cluster Manager) and live migrate or quick migrate the VM (depending upon whether the VM is running or not). After that VMM will immediately refresh the VMs state to the correct one….stopped or running. Problem: Solution:
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VM Additions not detected?
From time to time, I run into this issue with our Hyper-V environment. No matter how many times I upgrade the VM additions, SCVMM still is not able to detect it. It always ends up saying “not detected”. Eventually I noticed that one of the the 6 Hyper-V related services which are usually running on the VM was having some trouble – the heartbeat service. Hmmm…that makes sense! If I tried to start this service, I got the following error: Error 1083: The executable program that this service is configured to run in does not implement the service. While doing some searching on the net, I found out the…
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What is Driver Locked memory?
I noticed that one of my VMs (on Hyper-V 2012) was using a lot of RAM. Strangely, there was no application which was using that much RAM. It was using 14.2/16 GB RAM. At that time task manager showed this: And this in the details tab: Notice that Oracle was using only 1.8GB and that was the highest user. Even if I total everything, it still was nowhere near 14 GB used. What was using all that RAM?