The tape backups you create should be stored in a secure, data-friendly environment. Some administrators boast about the security of their systems but keep tape backups of critical server data in a cabinet or even on a table easily accessible for others. The entire system, including user account information, is on that tape, so it should be protected and secured in the same manner as the machine that houses the data. Keeping a copy of your data off-site or in a protected area is imperative. If a disaster strikes, you won't know where it will stop.
Some companies use fireproof vaults as an alternative to off-site storage.
These vaults are typically kept in a secure sever room where they are safe from disasters and intruders. Excerpts are scanned from the book and converted to text.