Ok, so is it possible to build such an array?
Yes.
I have 3 empty disks and 1 full of data. I would like to use the 3 disks to build the array, copy the data from the full one into the array and then add the now empty disk. I read something of "degraded" arrays, but I haven't seen a self-explanatory howto about this anywhere.
Install mdadm (http://www.cse.unsw.edu.au/~neilb/source/mdadm/) and read the mdadm manpage (search for 'To create a "degraded" array').
-- Mads Peter Bach Systemadministrator, Det Humanistiske Fakultet, Aalborg Universitet Kroghstræde 3 - 5.111, DK-9220 Aalborg Øst - (+45) 96358062 # whois MPB1-DK@whois.dk-hostmaster.dk
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