Actually, I was assured by the NetAdmin that my server was being backed up (the partitions that hold my MDF's and LDF's) as part of the backup sets with the rest of the network. The lesson I learned is that I should have been managing my own backups, not relying on someone else to do it as part of the rest of the domain's backup... anyway, I lost the device that had the MDF on it, but the LDF devices did their jobs. The tape set that was supposed to have the files on it was never actually activated, so the job was there, but was never run.