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Re: [Networker] Long term retention question
2006-01-05 17:31:26
I'm not sure capacity is even important in this
context. Readability / recoverability is.
How many tapes will go un-migrated over the next
50 years, even if they are retained that long?
How much data from the Apollo era has gone
missing for the same reason? How many classic films have
deteriorated so much that they must now be "restored" from original films?
In archival circles, the term LE500 (Life
Expectancy 500) denotes that media is expected to last for
500 years under normal storage conditions, yet
this is solely for analog media. None of this exists for digital
media. There are few guarantees beyond 3 years,
let alone 10 or 30 or 100 depending on which industry
you work in.
I have a few thoughts in this direction, but as
you say, that is another topic...
--PLB
At 11:16 PM 1/5/2006, you wrote:
Peter L. Buschman wrote:
What media are you using that will last 99 years?
The first company that provides an answer to
that question that works with NetWorker,
NetBackup, TSM, etc., has a ready-made market.
I wouldn't even try to guess the typical
capacity of a piece of backup media in 99 years, or even 20.
History seems to show that we have previously
underestimated the pace of future progress in
IT. There's still an old joke in the fortune
program that's almost not funny because it's so
close to the truth these days. I will share...
Imagine that Cray computer decides to make a
personal computer. It has a 1500 MHz processor,
200 megabytes of RAM, 150 gigabytes of disk
storage, a screen resolution of 1600x1600
pixels, relies entirely on voice recognition for
input, fits in your shirt pocket, and costs £300.
What's the first question that the computer community asks?
"Is it PC compatible?"
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