Comment 7 for bug 912522

I'm recreating this and wondering just how big a case this is... I think the best solution is brendan's, just write to what's writeable... plus I think I'll add to the description suggesting that usb keys are used in preference over usb HDDs.

I'm just concerned, given the comments here, that someone is going to plug in their 2TB NTFS hard disk full of photos and personal data, and have this test accidentally destroy their filesystem... Granted there's always a slight chance of that happening (and I get that we're doing essentially the same thing on the onboard HDD) but I'd rather lose whats on my laptops HDD than what I have stored on USB disks.