Costs of Managed Archiving versus Passive Archiving of Data

"Regarding storage costs -- again its unhelpful to be vague, but equally unhelpful to be too specific. The cost of a 1 TB [terabyte] hard drive from the local IT hyperstore is NOT a useful number for estimating cost of reliable storage. Unfortunately the 'price of reliability' is equally hard to determine.

"The 'rule of thumb' most quoted now is 'one million dollars per year per petabyte' for 'managed server' storage eg disc-based storage from a well-run data centre that does good redundancy and backups. That means of course one thousand dollars per terabyte (per year) and that's a good estimate, in my view, to use for funding request and planning purposes. It can be done more cheaply -- up to ten times cheaper -- but that introduces various risks and requirements that you may or may not want to get into. In the BBC where we know that archive content is, on average, used once per four years, we're happy to put datatape on shelves and go for a much lower cost per terabyte" (Richard Wright, Sr Research Engineer, Research & Development, BBC Future Media & Technology, from: [email protected], 06-04-2009).