Slides from May talk now available

[S P Arif Sahari Wibowo]

On Fri, 15 May 2009, Robert Brockway wrote:
> http://www.timetraveller.org/talks/backup_talk.pdf

Thanks Rob! Make feel more unfortunate not be able to come. :-)

Few questions I have in mind; sorry if these questions already 
came up in the talk before.

For home purpose and probably small businesses, they may want to 
take a look at other solutions which are cheaper or at least 
less overhead cost:

  * Archival grade (so called medical grade) CD-R and DVD-R. Yes 
we know that "100 years CD" is just myth and that many cheap 
CD-R & DVD-R does not even last a year; but how about this 
archival grade stuff (and where we can get it in Canada, 
anyway)? With good error correction mechanism (any good open 
source solution?) can this last to - say - 10 years reliably?

  * Solid state drive / storage. Sure if you scale it, it will be 
expensive. But if you don't need that much data to backup, it 
can be cheaper than tape, since the low overhead. And its 
longevity seems promising, considering no moving parts; 
certainly seems better than hard disk. And when you said to take 
a look in 5 years, the cost most likely will be down much more 
by then.

And several caveat I think should be point out:

  * With tape, except for few (or just LTO?) open standard, each 
manufacturer have their own tape format; so there is a risk - 
especially for long term backup - that your tapes ended up 
unreadable if the manufacturer stop producing the drive. Might 
need to chose "winning" brand.

  * Is there any study on hard disk data longevity when it just 
sitting not turned on for long time? If not, then it may only 
viable for "connected" backup.

And about your presentation:

  * Why "Genealogy", "example scheme", and "what can we recover" 
under the subsection "Tape vs Disk"? This seems to be more 
appropriate under "What?" or "When?".

Thanks!

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