[pure-silver] Re: Archival methods (was Re: Re: Film Still Wins ... Even Compared To Leica 18MPix)
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 2 Jun 2010 13:44:59 -0700
----- Original Message -----
From: "Dana Myers" <dana.myers@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, June 02, 2010 8:54 AM
Subject: [pure-silver] Archival methods (was Re: Re: Film
Still Wins ... Even Compared To Leica 18MPix)
On 6/2/2010 1:48 AM, Snoopy wrote:
Recently German TV showed a documentary about the Central
Music Archives
in Berlin which has problems with storing music CDs etc.
They report a
life span of about 5 years and copy everything all over
the place to
make sure they do not lose things.
As an aside:
That's hardly representative of the permanence of CDs. I
was a fairly early adopter
of music CD in 1985, I have over 100 CDs that are well
over 20 years old
with no apparent deterioration. I do nothing special to
store them.
With that said, relying on the integrity of a single piece
of media for
long-term retention is not a good idea - the ability to
produce exact
duplicates with no loss of quality is critical to a
long-term archival
strategy.
Cheers,
Dana
I think there is also confusion between CD recordings
and writable or re-writable DVD discs. The former are
mechanical recordings where the data is in the form of pits
on the surface of a plastic disc which is then plated with a
reflective material. The latter are optical media. The
mechanical discs should have a very long lifetime. Even of
the reflective material comes off for some reason it could
be replaced. Since re-writable discs are intended to be
erasable there is always the chance of accidental erasure or
of the data fading in some way.
While digital storage can probably be made very long
lived on is still dependant on a very complex technology to
recover the data where a photographic negative or print
needs little else. The argument can be made that recovering
data from a negative depends on the very complex technology
of making photographic sensitive materials its still
possible to make printing material quite simply (salt prints
for instance) and text material can be read from a negative
with nothing more than a magnifying glass. This is to
illustrate that there are arguments on both sides.
Also, technology is not standing still: what is true
today may not be true in five years and certainly not in ten
or twenty years.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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