The value of backups
Yesterday, my file server crashed badly. I hit the per-user process limit, so couldn't log in remotely, couldn't log in on the console - and so couldn't do a graceful shutdown. So I cycled the power. When it came back up, one of the filesystems was a bit buggered, as expected. But it was a bit more buggered than I first thought and couldn't be recovered. So I
mkfsed it, adding journalling while I was at it, and it is now restoring from the last backup.