Replacing /dev/random and /dev/urandom with a non-CS-PRNG seems like a horrible, horrible idea to me.<p>And totally unnecessary. Create a new device. Use that in your dd calls.<p>It may be okayish for him, since his only use case <i>seems</i> to be "wiping my disk".<p>But boy, talk about surprising behaviour… replacing something well-known with something else entirely.