You can not connect IDE drives to a scsi controller. IDE drives to IDE controllers, and scsi drives to a scsi controller,you can not mix them. If you are asking if there is a scsi enclosure for scsi drives with say an ide bay for a cdrom drive or something like that...I have never seen anything like that as that would have 2 cables on the case to the pc. And since I have never seen a server or a pc with an external ide header there would be no point.
What are you looking to do?
Rich