forse ho trovato una risposta alla tua domanda direttamente sulle wiki della CM:
Q: I want to go back to another ROM, but when I try to restore a nandroid backup of another ROM, it doesn't boot... what did I do wrong?
A: Because this ROM is set up to use the MTD partition layout instead of Samsung's BML partition layout, you must use ODIN or heimdall with a full firmware including a PIT file and repartition.