On 8 Jan 2008, at 08:08, Nick Guenther wrote:
On Jan 7, 2008 7:22 AM, knitti <[EMAIL PROTECTED]> wrote:
On 1/4/08, Nick Guenther <[EMAIL PROTECTED]> wrote:
How would you verify the whole disk is readable? And if it's all
readable, how do you ensure the data is still the same pattern
you put
on before?
the posting von hannah shows what to do. Ths big picture is this:
Backup (and/or archiving) is not fire-and-forget. You have to know
how
long you want to store this data to choose the right technology and
media. And you have to have a process to verify that your data is
good
after this time. If you want backups for five years, and your life/
business
won't come to an end should you lose some data in spite having backed
up, use DVDs or HDDs, verify after backup and just store the media.
For more than five years and more-or-less critical data, use tape and
verify every x time. If you approach ten years and up, you have to
know how you get hardware to read the tapes...
You should REALLY install amanda www.amanda.org and I'd love to get a
thread going about how to set up and manage amanda under OpenBSD. It
looks fantastic but I've installed it on Debian Etch at the moment.
I'll probably convert to OpenBSD soon when we get a decent discussion
going. Seriously if you want to get a decent automated backup system
going look at amanda. I think it's under ports too :)
At least the LTO spec states that drives of the *current* generation
_have to_ read and write also tapes one generation older and
read tapes which are two generations older. So if you have LTO-2
tapes around, you will be able to read them with LTO-4 drives (which
should be checked, but does actually work in this case).
yup I've just taken delivery of an LTO4 and a semi ok computer (it's
a dell don't be sick).
Some companies and universities with huge archives spend
large sums just to copy their archived data to the newest technology
every couple of years.
Still have a few DLT drives. My office server running OpenBSD on a
sun blade 100 has a DLT4000 because Linear head technology is so
safe. Tapes don't often get mangled (I'm looking at you Mr dds drive).
Ah... it's the (http://www.)longnow(.org/). An unsettling concept,
that.
-Nick
