[talk] Climate Mirror

Pete Wright pete at nomadlogic.org
Wed Dec 14 14:23:06 EST 2016

On 12/14/16 11:15 AM, Thomas Levine wrote:
> The data don't need to be online; save them to a redundant bunch of
> cheap hard drives (or maybe tapes), and distribute them among lots of
> bookshelves. They can even be slow and small hard drives pulled from old
> computers; we need to write to each one only once, we might need to read
> from each one once, and we otherwise only need to turn them on once
> every couple years to make sure that they're still intact. Maintain a
> website with a list of the datasets, the datasets' checksums, and the
> contact information for the people with the hard drives on their
> bookshelves.
> Note that this is my opinion only on how this project could be
> implemented. I don't know enough about the datasets or the likely
> effects of geopolitics on their implementation in order to comment as to
> whether I think the project should be implemented.

not to nit-pick but i would strongly recommend *against* using HDD's in 
this manner (magnetic spinning ones, or SSD ones).  Drives are not 
designed to reliably store data cold like this mechanically or 
electrically.  This is why tapes are still in use to this day - they 
*are* designed for cold store.  And if you do hit a bad sector it is 
quite possible to skip that sector and continue reading data.

This is coming from quite a bit first-hand experience where I've lost 
data-sets which were in cold-storage on HDD's for about a year that were 
totally lost, versus data on tapes which were in cold-store for around 
5-7years where we had few problems recovering our assets.


Pete Wright
pete at nomadlogic.org

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