Comment 3 for bug 346589

Matt,

I'm aware of how horrible having UI here is, I've been wondering if there's anything we can do for the cases where we know that we have partitions that we just don't want to touch, such as in the case of usb disks created with usb-creator or mobile images.

Unfortunate as it is, the dialog is necessary as we cannot reread the partition table of disks with mounted partitions. The buttons in the UI in bzr trunk are "Yes" and "No" with translations taken from GTK. They behave just as you would expect, "No" means that the install will proceed without being able to use the disks with mounted partitions as an install target, "Yes" tries to unmount them.