For those who are fan of the Beattles and who would have forgotten about the Rules of Backups, here is a dedicated version of: «Yesterday».
Yesterday,
All those backups seemed a waste of pay
Now my database has gone away
Oh, I believe in yesterday
Suddenly,
There's not half the files there used to be
There's a deadline hanging over me
The system crashed so suddenly
I - pushed - something wrong
What it was I could not say
Now - all my data's gone
and I long for yesterday-ay-ay-ay
Yesterday,
The need for back-ups seemed so far away
I knew my data was all here to stay
Now I believe in yesterday
Source: found on the web