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I have installed Debian 8.9 on an USB external drive. lsusb identifies the external drive as follows:

ID 0bc2:2320 Seagate RSS LLC USB 3.0 bridge [Portable Expansion Drive]

I would now like to boot an Acer Veriton M6620G PC from that drive. However, the PC's BIOS does not seem to recognize it as boot device for it appears neither under nth Boot Device (nor Hard Disk Drives Priority nor Removable Devices Priority) in the BIOS.

If I insert a USB memory stick instead, the BIOS recognizes and lists it both under nth Boot Device and Removable Devices Priority.

I've double-checked that the USB external drive (as well as the USB memory stick) is bootable. The external drive apparently uses USB 3.0, whereas the memory stick USB 2.0. After booting Debian 8.9 on the PC from another boot device, it recognizes the USB external drive normally on the OS level (with lsusb, etc.). The system BIOS version is P01-All.

Is there a known reason why this PC's BIOS does not recognize this USB external drive, and is there a way to successfully boot it from that device?

rookie09
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1 Answers1

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It has become increasingly popular for PCs to obscure or eliminate "legacy" booting in favor of UEFI booting. Ensuring that the appropriate UEFI boot partitions are created when installing an OS will allow it to boot on UEFI-only systems.

Ignacio Vazquez-Abrams
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