How to Increase a Virtual Disk in VSphere 4

Recently we have had a couple of incidents where we had run out of disk space on our Windows servers. Sometimes we were able to rectify this just with simple housekeeping: Removing programs no longer needed, or deleting profiles, and temp files etc.

There have been times though when this just isn't enough, and nothing short of a bigger disk will do. With  vmware it is possible to increase the size of a non system volume quite easily with a few simple steps. It can also be performed without shutting the server down and zero downtime.

Note: Before attempting this you need to check 3 things.