How to Backup is a free online mini-book explaining basic ideas about how to backup your network, backup technologies, and backup strategies to keep your systems online, and your data available.
How to Backup is a simple read. It doesn't get too theoretical. It doesn't cover enterprise backup - it's for small businesses and home offices.
You think you know what a backup is, but, do you really?
What is backup?
A backup is a copy of your data.
A backup is an archived copy of your old data.
A backup is a system that can be used to deliver your data, if the primary system fails.
A backup is a system that keeps operating, transparently, even if part of the system fails. It's fault-tolerant.
A backup lets you recover from bad data, quickly.
A backup with frequent incremental backups lets you undo a huge run of bad data.
A backup is a part of a system that costs less than the entire system, that allows nearly all people to keep working in the event of an equipment or data failure.