On 30 Mar 2010 at 15:59, dhbailey wrote:

> I won't use the internet for storing my 
> backups -- nothing's truly and verifiably secure on the 
> internet and nothing's to prevent some such company from 
> going out of business just at the time when I need to 
> restore those files to my hard drive.

You seem to be under the impression that one backup is ever 
sufficient. It's not. In my 20 or so years of work as a computer 
tech, the only time anybody has ever lost anything that wasn't 
recoverable from a backup was because multiple levels of backup 
failed.

To me the perfect example of this was the failure of the Roosevelt 
Island Tram in NYC a few years ago, where riders were stranded 
hanging in the tram over the river for hours and had to be rescued. 
The tram had a main motor and two backups. The main motor failed, and 
the backup failed. The second backup was in the shop for repairs, so 
people ended up stuck.

Two levels of backup failed.

You are not safely backed up if you have only one backup strategy -- 
have at least two if not more. And any loss of one backup should be 
irrelevant.

-- 
David W. Fenton                    http://dfenton.com
David Fenton Associates       http://dfenton.com/DFA/

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