Ok guys, there's an error in the 0.9.5 version of the script causing this anomaly. It should copy zeroes to the entire disk, but dd is skipping the last 10 (2097152 bytes sized) blocks of the disk, leaving it in an inconsistent state. I'm trying to fix it right now, but every change need 24 hours to be tested on my test disk, so it will take some time to debug it.