Question, I have an external USB drive attached to my Sentinel. And when I reboot the Sentinel, it just hangs at loading OS, forever. I have found if I unplug the USB drives it comes up just fine. Is it trying to boot from the USB drives? Is there a way I can correct this?
The drive is bootable, you need to clean the bootsector from it.
Make sure there is nothing you want to save on the usb drive and then open an administrative cmd prompt, type diskpart -> list disk -> select disk # (replace # with the correct disk number) -> clean -> create par pri -> format quick -> assign -> exit -> exit. Browse to my computer and you should see the new clean drive, reboot the dx4000 and it should boot fine.