External USB drive not recognized in BIOS Xseries 3650

[Mootser13]

Working on an IBM Xseries or X series 3650 server and I am trying to get the bios to recognize an external 20 gig HD via USB. A flash USB drive works, but this 20 gig drive doesn't. Bios version is completely up-to-date.
System type: 7979G5U
Want to boot to the external drive with BartPE. Success with the USB Kingstion, but not the 20 Gig external USB.

 

[ibmtech65]

Not sure on these new machines as I have not had a chance to play with them yet but you might want to check in the BIOS and see if legacy USB device is enabled.