@cnx @acdha Yes, but the way it works is that you create a dm-crypt partition seeded from /dev/urandom, then you mount it and fill it with 0s. The encryption translates the 0s into random bytes.
Here are the instructions I usually use: https://wiki.archlinux.org/title/Dm-crypt/Drive_preparation
Wait @pganssle, isn’t /dev/zero the opposite of random? Cc: @acdha