I worked at IT for a large university. We had an HP/Compaq SSL2020 with dual AIT drives made by Sony. The issue was never determined (perhaps micro debris in th

I worked at IT for a large university. We had an HP/Compaq SSL2020 with dual AIT drives made by Sony. The issue was never determined (perhaps micro debris in the air), but the drives has to be replaced nine (9) times due to failure. Furthermore, backup and verification is a tedious process, and combined with local and offsite vaulting and tape management, having proper backups is a royal PITA but there's no substitute. Replication isn't a backup because it propagates errors and you can't do disaster recovery without proper software, offsite vaulting and practice. Backups aren't valid until they're tested.