When I use alt-Wash, if I press Esc to abort it, I get an option to keep the temp files. I would like that as an option before I start as well. Ie the operation can complete unattended, and when I come back the temp files will be there.
The idea is to be able to confidently prove a disk has been washed by noting that there's no disk space left, and that the temp files are full of random characters.
The user then has to delete the temp files before using the disk.
Does anyone else feel this would be useful?