Vmdk

I’ve found that vmware converter (this may be fixed in newer verions) creates vmware guests with an IDE controller. There can be performance issues if you choose to remain with this particular controller… Best bet is to change it to one of the various vmware SCSI controllers…

Depending on which windows operating system you are running depends on which controller you use….  http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006621

Guest Operating System	Adapter Type
Windows 2003, 2008, Vista	lsilogic
Windows NT, 2000, XP	buslogic
Linux	lsilogic