It’s not often that we hear the stories of a data center being destroyed, but it happens. If your backups remain onsite, or even worse — they stay in the tape library for a week before you remove them, then you are at risk if a disaster strikes. We actually had a customer who had a fire in their building. The tape was still in the tape drive. Pete’s advice was to cut the cable and grab the tape drive and run. This is not a good disaster recovery plan.
Security, recoverability, ease of restoring
When I was a System Administrator in the early 1990s, my colleague and I took our backup tapes home to keep them offsite. I didn’t have a fireproof safe, I just had a box with tapes that I kept safe. On Friday night, the backup would run sometime after the JDE nightly process would finish and the tape would stay in the tape drive until Monday morning at 6 AM when one of us arrived. That tape stayed in the building all day until after work when it would leave with whoever had the early shift that week. We had a backup, we even took it offsite, but was it really the best solution? No. It was what we knew at the time.