So I previously had an encrypted install of Debian, and wanted to install a new distro with full system encryption again. Now I understand that you don't need to fill the disk with random data if you already had encrypted partitions, and that wiping the LUKS header(s) will suffice. But now I deleted those previous partitions and I'm kinda stuck on what I have to do now. Do I have to fill the whole drive with random data again (at the possible expense of SSD lifetime, with questionable effectiveness in regards to cache in SSDs) or just let it how it is now, and create new encrypted partitions? From what I've read, when choosing this last option, some background 'noise' will remain, making it easier for an attacker to retrieve data (from the new partitions).
What do you think?