less than 1 minute read

Whetever you know it or not: you need a solid backup strategy for all your data.


Real men don’t take backups, but they cry a lot.

Problems you need protection from

Hard drive failure

Hard drive reliability

\[ AFR = 1 - e^{(-\frac{1year}{MTTF[h]})} = 1 - e^{(-\frac{8760h}{MTTF[h]})} \approx 0.00872 \]

\[ AFR[\%] = \frac{1year}{MTTF[h]} * 100 = \frac{8760h}{1 * 10^6h} \approx 0.876 \]

File server failure

Your house burning



Backup Strategies

To protect yourself from the problems above, you need more than one backup plan or strategy. You need a layered and combined strategy that protects you from all the different error mentioned above, if you want to keep all your images for as long as you live.

If you don’t have a good backup strategy implemented, I can promise you that it will end in tears.

RAID 5/6


External drives

Spare parts

Offsite copies


Ronny A. Nilsen
  1. TL;DR or TLDR is an acronym that stands for “Too Long Didn’t Read.” While originally the acronym was was an insult to criticize a piece of writing as overly long, tl;dr have now taken on a second meaning as a shorthand for a “summary,” frequently called the tl;dr version of a longer account or article. Like it is used here.