Where X is the controller ID and the Y is the disk ID of the Virtual Disk. To configure a specific virtual disk to appear as an SSD, you just need to add the following: This setting is only supported on Virtual Machines that is running virtual hardware 8 or greater. So the solution is actually quite simple and it is just an advanced setting in the Virtual Machine's configuration file (VMX) which can also be appended to using either the vSphere Web Client, vSphere C# Client or the vSphere API. For other guestOSes, maybe you want to see how the system would react to an SSD device, perhaps drivers or configurations maybe needed and you would like to run through those processes before installing a real SSD device. You might be developing a script to enable this feature and having a "fake" SSD device would allow you to create such a script and test it. So why would you want to emulate an SSD device? Well for a vSphere environment, you may want to try out the new Swap to Host Cache feature from a functional perspective to see how it would work. It turns out, one of the engineers knew of a better way of emulating an SSD Virtual Disk that can be consumed beyond just Nested ESXi VMs but also for any other guestOSes that supports SSD devices. I figure this would be an easy answer and pointed the user to a blog article I had written a few years ago on how to fake an SSD device in ESXi using SATP claim rules via ESXCLI. There was a question that was posed internally about emulating an SSD device for a Nested ESXi environment running in VMware Fusion. I continue to be amazed everyday at all the awesome features and challenges being tackled by our VMware Engineering organization and yesterday was another example of that.
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December 2022
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