We were moving buildings in 2006. The datacenter was not getting re-IP'd and did not have cross-connectivity, some infrastructure was moving ahead of the final move, including the backup targets.

So, I'd turned off the svn backups (dumps and post-commit incrementals) when the targets moved about a week before the final people move. We got into the new building and in the rush of getting everything setup, I'd forgotten to re-enable backups (had not made a checklist). Sure enough, svn server crashes, BDB corrupted, last backups about 8 days old.

Fortunately, we had nightly build snapshots, code on dev workstations, etc, so it was mostly a rock-fetch project to put things back together starting from a fresh repo. We had other automation that used the repo path and revision, so I created a "devtemp" repo and restored the backup re-imported all the code there and then laid on incrementals from nightly builds and dev workstations. In the process, I checked in the vast majority of our code as the author of "revision 6".

10 years later, I was still getting svn blame based questions "about this code you wrote (in -r 6)" "Man, that sokoloff dude wrote a whole lot of crappy code..."

Now that we've been mostly on git for 2 years and only have those repos for historical archeology, the questions are finally dying off.