Recently I setup a VM using standard best practices. Such as using PVSCSI for the Database drives, and formatting them GPT. Everything checked out so I passed it on to the DBA to finish up with the SQL installation. Soon later I received an email from him saying the drives were inaccessible. I had no idea why because I had setup a lot of VM’s the same way without any issues. I did a quick Google search for “drive inaccessible after SQL installation”. It turns out a lot of people have the same issue as me. It is the result of Microsoft locking down the security for the data on the drives. They set it up so only SQL could have access to the files to prevent certain security issues. You can read more about it here.