(This blog post was changed since my initial strategy of disabling the lockfile didn't work. Turns out, the lockfile is required, and backups have to be stacked.) Yesterday, I wrote about how Time Machine has failed me. Time Machine keeps regular backups, going back as far as your hard drive space permits. In theory. In practice, every year or so it messes up somehow and has to start over, thereby deleting all your older backups. A backup that is not reliable is not a backup. Luckily, there a...