USB qube when installed on external SSD

[newqub...@gmail.com]

So, quick question that I can't find asked anywhere. I'm installing qubes. Hopefully for the last time. I'm wondering if I can create the USB qube when I'll be booting from an external SSD. I'm thinking no because it would potentially cut itself off... If I'm right about this, is there another way to securely use USBs? Or maybe make the qube, but omit the SSD?

[unman]

On Mon, Feb 04, 2019 at 12:34:28AM -0800, newqub...@gmail.com wrote:
> So, quick question that I can't find asked anywhere. I'm installing qubes. Hopefully for the last time. I'm wondering if I can create the USB qube when I'll be booting from an external SSD. I'm thinking no because it would potentially cut itself off... If I'm right about this, is there another way to securely use USBs? Or maybe make the qube, but omit the SSD?
>

The answer depends on how many USB controllers you have.(I'm assuming
that your SSD is connected via USB, although you dont actually say
this.)
If you only have one controller, then you're right about cutting it off.
If you have two you can allocate one to sys-usb, and connect other USB
devices to it.
Look at www.qubes-os.org/doc/usb and
www.qubes-os.org/doc/assigning-devices/ for advice on identifying USB
controllers.