Cannot boot PC with GPT-formatted external drive connected
Posted on 2014-10-05
I recently bought a 4TB external drive, and partitioned it as one large drive, setting it to GPT. My Win7 Pro laptop recognizes it just fine, and reads and writes with no problem.
But if I reboot my laptop with it connected, my BIOS screen never comes up, and it will never boot up into Windows like normal. Only if I disconnect the drive from the USB port will the laptop boot up like normal.
I once saw this happen to a PC that had a 1TB internal drive that had gone bad with a hardware problem, where the drive would just click. Until I disconnected it, the BIOS screen would never appear, and the PC would not boot up.
But in this case the external drive is working just fine. Is there a way to get past this problem where I can't boot up with it connected to a USB port? TIA