Michael Proctor said:
I ALWAYS make 2 copies of backups. One for here at the house, One to keep
at a friends house. Just my 2 cents worth.
What regime you adopt for your backup is entirely driven by what risk you
are prepared to run. I personally use a father/grandfather system. Weekly,
I do a differential backup to the older of my 2 backups. If I need to
restore, I use the most recent. If that didn't work, then I would use the
older backup. I have accepted the risk that I might lose up to 2 week's
data, but as I don't produce that much, this represents an acceptable risk
to me. The grandfather backup is kept in the garage when not in use
(separate building).
In theory, I do 2 full backups monthly, but in practice this is sometimes a
bit lax and can be done up to 2 months later. Again, the risk is acceptable
to me in a home environment.
If I was running a business that depended on the computerised data, this
would be totally inadequate.