A bit more interesting information about archiving image and sound file da=
ta.
First,
At 02:34 PM 6/24/2010 -0700, Philip Tyler wrote:
>I can across this on a photographic website:
>
>http://www.dpreview.com/news/1006/10062301sandiskwormsd.asp
>
>Here is the last paragraph, which may be of interest to some.
>
>Beyond forensic image archiving, SanDisk expects its SD WORM technology to=
>be widely adopted in crucial applications such as audio recording and
>long-term retention of legal documents and medical files. For more
>information, visit www.sandisk.com/sdworm.
>
>These 'WORM' memory cards will apparently allow storage up to 100 years.
>Which should be a bit more secure than DVD's or CD's?
I've been following the on going discussions about best and long term way
to archive our files with quite a bit of interest. My approach has been to=
use SDHC 8GB cards from Sandisc mainly as these are what I use in all my
digital cameras and LS-11 recorder. I've not really spent any time to find=
out if this is wise or not as at some point in the near future, I'm
planning a major computer system upgrade and have enough knowledge of
electronics and data storage that I've not felt the need to make the effort=
.
However, reading Phil's message about the SanDisc worm and its projected
storage of 100 years and this little bell went ding in the grey matter
somewhere between my ears.
So, I sent an e-mail to SanDisc customer service last night:
"I use Scandisc Ultra and Extreme SDHC cards for both Nikon cameras and
Olympus PCM digital recorders.
How long is it safe to depend on these cards for long term storage and
archiving of data?
What is the best way to store these cards?
Are they sensitive to heat while stored?"
And today I received the following reply:
>Thanks for emailing SanDisk Technical Support. It is our goal to make sure=
>you have all the resources you need to get the most from your product.
>
>Please note that Sandisk cards has 1,000,000 hours MTBF (Meantime between=
>failure). The ideal way to store it is in room temperature.
>
>The Ultra cards don't have any temperature rating declared unlike with the=
>Extreme cards that are tested to perform from -25=C2=B0C to 85=C2=B0C (-13=
=C2=B0F to 185=C2=B0F).
Now, seeing 1,000,000 hours MTBF, a simple calculation (1,000,000/(365*24)=
shows that you should expect 114.155 years between failures.
I make the assumption that the only real difference between the SanDisc
WORM and the SanDisc SDHC cards is that you can erase and edit files stored=
on a standard SDHC card where as you can not the WORM...
Very interesting sez me, me thinks I'll keep archiving my files on SDHC
cards and not worry about longevity as long as cards are left alone, the
data will outlast me, my children, and probably my grandchildren at this
point...
I suspect the WORM concept is more to favor legal issues where data must be=
secure and un-alterable, for most of us, we already have the capability we=
need at hand...
--
Thanks,
Mitch & Shadow...
http://www.4shared.com/dir/UTASxktL/wildlife.html
Shadow's area: http://www.4shared.com/dir/ecfWjyZb/Shadow.html
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
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