dd if=/dev/zero of=/dev/sda4 And set up LUKS on that device again.
Feel free to change the bug task from udev to whatever tool you used to create the device, I've opened a task on cryptsetup speculatively ** Changed in: udev (Ubuntu) Status: Confirmed => Won't Fix ** Also affects: cryptsetup (Ubuntu) Importance: Undecided Status: New -- udev fails to identify crypt_LUKS swap partition by uuid https://bugs.launchpad.net/bugs/362315 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs