Disks are Cheap but Backup Systems are Expensive

A Backup Spectrum: MB to GB to TB (and more)

• Stuff that must be backed up, e.g., source code, (e.g., /home).
• Data time-consuming to reproduce — mirrored (probable state of future UoM RDS).
• Large-scale, reproducible data — not backed up (e.g., /scratch).

Meta Backups

• Backup what you need to recreate what could be lost — source code and notes.