The IDE/SCSI Devices tab only shows drive information and not all IDE devices as you may think. We are looking into the possibility of collecting all data about installed devices similar to the information provided by the Device Manager in Windows itself.
Indirectly, this is a very good point you've brought up. There are two tab names are a little ambigous. Our "IDE/SCSI Devices" tab should actually be renamed to "IDE/SCSI Drives" and the "Drives" tab renamed to "Logical Drives" or "Drive Letters".
We will make this change in the next release. Thank you for bringing it to our attention.