Curious case of read-only flash drive

[MR ZenWiz]

On Fri, Nov 20, 2015 at 3:54 PM, Pete S <smoutpete at gmail.com> wrote:
>
> Dban it after copying important data off it
>
> www.dban.org
>
> Military grade data destroyer
>
Forgive me for asking an obvious question, but doesn't the drive have
to be writable for anything on it to be erased (other than by bulk
electromagnetic disruption)?

I'm pretty sure that as long as the drive thinks it is not writable,
it also cannot be erased.

Thanks.
MR