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Posted by Martin Heffels on 07/21/07 10:31
On Tue, 17 Jul 2007 17:28:49 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:
>Yes, true, harddisk masters are very vulnerable, drop one and all is gone.
Why would you do that? ;-) A safeguard would be using a RAID-system
>If we leave magnetics aside there is this holographic optical thing
Sounds like an interesting technology
>But I think optical media have a big plus over tapes.
>Dropouts, fungus in moist climates are for example things tapes are sensitive to.
That is a matter of storing. Most people think you can put the tapes
just in a cupboard in the attic. With a bit of thinking, you can store
the tapes in a safer place, making them last much longer.
Optical media are not safe either. They are vulnerable to fungus as
well, and you can't leave them lying around in UV-rays for too long.
Tape is a bit better protected.
In the end it comes down to being able to restore damaged media. With
tape you loose only a little bit, if you cut out a section, but
optical media is a bit more difficult if the damage is larger. You
would loose more as the bit-density is mucher higher than with tape.
>Given change in technology we will have to backup digital again on some new medium likely
>every 10 years or more often...
You can always store on film. That will last a 100 year or so :-)
>Of course it could all end up on one little chip :-)
>No moving parts.
>1 Tera Byte SDcards?
>If you extrapolate the curve I'd say 'yes'.
But then yoiu are always dealing with the fact that the
connector-interface is changed every so many years, making the card
obsolete (just like with all the different tape formats).
cheers
-martin-
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