We just installed ESX 4.1, as some of you may already know by default the datastore only allows a VM Disk to be 256GB. So we need to delete the datastore and create a new one that will allows to create bigger VM Disks. The problem is that we can't delete the datastore because it says a resource is in use. This is a fresh install of ESX 4.1 so n data has been added to the datastore. After looking into this issue I saw that esxconsole.vmdk was inside the datastore, but this is the actual ESX server OS, so I can't delete it. ESX 4.0 doesn't create that esxconsole.vmdk file in the datastore, so it has to be an issue with 4.1. Thanks!