We once deleted the lost+found folder on an old Unix system* by accident. Things went very badly the next time the system rebooted, fsck did not handle it at al

We once deleted the lost+found folder on an old Unix system* by accident. Things went very badly the next time the system rebooted, fsck did not handle it at all well. * Probably DEC Ultrix 2.2, a BSD 4.2 derivative.