On Dec 5, 2005, at 10:41 PM, AB wrote:
So... the object of having a backup drive is having TWO backup drives.
No, the object of having a backup drive is to remove a single point
of failure leading to data loss.
If you just move files to the external drive (versus copy them) all
you've done is move the single point of failure. As you're finding
out, if that fails you're losing things.
Not losing things is the entire point of backups.
It all boils down to a question of how much your archived data is
worth to you. While a letter you wrote five years ago may not be very
important, digital video of your baby's first steps is irreplaceable.
More and more of our lives are on these things.
Here in the college primary research data is never hitting paper; we
have instruments that capture data directly to HDD; losing that means
re-doing the experiments. In some cases that's merely prohibitively
expensive, in others it's flat out impossible. We have to work very
hard on having proper backup strategies in place, and increasingly
meet auditing requirements for data retention.
Now your macs may not be supporting millions of dollars worth of
research, but consider how much it would cost (time and money) to
replace what's on that drive. Then you'll see that buying more drives
is really cheap in comparison.
Recovery services for getting data of of failed HDD's start at $800
and go up.
As for DW, no it won't need huge amounts of space to rebuild the
directories, it works in memory, in fact. It will take a while, and
you'll only do one partition at a time.
But if it is just a munged directory, DW is really good at getting it
off.
--
Bruce Johnson
This is the sig who says 'Ni!'
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