> That's why I generally use a software RAID1 setup, even in a laptop.
> It's not supposed to replace a backup, but helps better than a backup in
> the case of drive failure.

A security against resource tradeoff, as always.
"At home", I find that "save often, save now, copy to USB key if it
matters that much, backup to LAN as soon as available" usually
suffices (always so far).
(Dropbox may allow that to be "send home via (insecure) cloud whenever
WiFi available")

Away from home I use a USB powered portable HDD and when feeling the
need for intensive and/or extensive transfers have been known to tape
the portable HDD to the back of the laptop LCD. reduces security re
physical damage of drive but so far does what's needed with minimum
effort, expense and beauty. (Minimum beauty can be a plus feature for
some engineers). In a laptop with no 2nd drive bay something
functionally the same as but "somewhat" [tm]  more tidy and permanent
than my taped on drive may fill the backup need.

When travelling between distant locales I usually wear "cargo pants"
(those who affect suits when travelling can choose an appropriate
jacket pocket) with the HDD zipped in a front leg pocket. The theory
is that if I can manage to run from the plane burning the photos (main
concern) and any data will probably survive. If they don't I probably
won't notice.  Not leaving drive in airport X-Ray machines features on
checklist. (One bag ever and got it back after several weeks).

On a recent trip I had 3 copies of several weeks of photos. Two got
lost enroute (along with $2000 of gear). Copy 3 of the  photos made it
home.


             Russell
--=20
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