On 07/02/11 14:30, Andrew Webber wrote:
Good points, though I tend to put them in paper sleeves. :(
Digistor is flogging "Archive Grade Recordable Media at Consumer Grade
Price", I wonder if there truly is a difference. I know I'd be willing
to pay more for a disk that would last>10 years if I were putting
backup data or original material on it, vs. backing up a DVD (well
okay that wouldn't be a BD) or archiving TiVo recordins.
The "Archive for Life[TM]" disks bottom out at 99c for BD and $4.25
for BD-DL. I know there's a huge range in quality of DVD-Rs and assume
the same of BD.
Paper sleeves are fine for a backup that you know will be superseded
by the next one in a month or two. For the long term stuff, the better
methods will help ensure you have data.
The Taiyo Yuden disks are very good. Their detractors say they'll only
last 10 or 20 years, not the 50+ that tu projects.
The problem I have with blue ray archiving is that a mess up on the
disk could cost you a huge amount of data lost. That, and we just
don't have good ideas of how long they'll last. The reason why I
mentioned the now ancient 8mm disks is that I have several, and
my test tape from 1989 still reads correctly. So have the others
that I have occasionally used. 4mm tapes haven't survived nearly
as well. It's an odd game, trying to figure out how to archive stuff.
My last comment is that a DVD backup, for the really important
stuff should have nn identical disks made at once. If upon retrieval
time one of them is bad, you have the others to look at. Even
better, it isn't hard to write software that takes nn DVD drives with
the backups and walks through each sector on the disk on all drives
comparing them. Hopefully, the bad spots won't be the same on all
the disks, and you can get all the data.
But we're still talking of media that places in comparison to... paper!
--STeve Andre'
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