On 25 Oct 2006 at 10:19, Harold Fuchs wrote:
...
> > Is there a special reason why you want to backup to CD?
> > 
> > My experience (but maybe no one else's?) is that when you finally
> > need your CD backup, the CD can't be read properly anyway. I
...
> > think that will be necessary. Maybe an external HDD could be a good
> > idea? 
> <snip>
> Till someone steals the computer with *both* disks inside it ...

This is really a bit OT for this list, but anyway....

Before deciding how to do a backup, decide /why/ you're doing it. What 
are you protecting against? What are the possible problems and their 
extent?

eg "what":
*1 accidental user destruction of data
*2 sudden hardware malfunction (incl HD dying)
*3 incremental malfunction (I've seen data on a HD /slowly/ damaged 
over a period of many weeks)
*4 loss of machine (eg theft)
** ?????

eg "extent"
*A affects only the machine (eg power surge)
*B affects the building (burns down)
*C government confiscates the equipment (all of it :-) )
*D nuclear explosion wipes out the neighbourhood
** ?????

What you do will depend on what you assess the risks and associated 
losses and costs to be. For example, dumping to a 2nd internal HD won't 
protect against item 4.  Dumping to a usb drive won't help if it's 
stored near the computer and the building burns down (item B). Dumping 
to a RAID farm the other side of the world is likely to be rather 
expensive :-)  If D happens, you're quite probably not fussed anyway 
about the data.

But then, we all know these things....... :-)
-- 
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[EMAIL PROTECTED]    Mike Scott, Harlow, Essex, England

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