There appear to be four device id's initially
Adding the USB drive allows the s/w to be installed and brings the partition up (as a CD Drive) to create the encryption using the Ironkey unlocker
Right clicking this and checking properties brings up four 'Hardware' options
Hitachi ATA Device
IDE\DISKHITACHI_HDT721050SLA360_________________ST3OA31B\5&21AEE20C&0&0.0.0
Ironkey Secure USB Device
USBSTOR\DISK&VEN_IRONKEY&PROD_SECURE_DRIVE&REV_2.06\00552659&1
HL-DT-ST DVDRAM ATA Device
IDE\CDROMHL-DT-ST_DVDRAM_GH40N___________________NV01____\5&EF53167&0&1.0.0
Ironkey CD-ROM USB Device
USBSTOR\CDROM&VEN_IRONKEY&PROD_CD-ROM&REV_2.06\00552659&0
Looking for anything else in the Device Viewer also shows
Portable Devices (Ironkey)
WPDBUSENUMROOT\UMB\2&37C186B&0&STORAGE#VOLUME#1&19F7E59C&0&_??_USBSTOR#DISK&VEN_IRONKEY&PROD_SECURE_DRIVE&REV_2.06#00552659&1#
Thanks