On Mon, Apr 28, 2014 at 14:02:47 -0400, Fred Smith <fredex@xxxxxxxxxxxxxxxxxxxxxx> wrote:
though I can't tell you the steps, it is possible to build a raid-1 array using Linux Raid, with only one drive. it'll be in "degraded" mode because of only one drive, but you could then easily (??) add a second or subsequent drive to the array. Instructions (more or less) abound on the web.
It doesn't need to be in degraded mode. You can use the force option to set it to only have one device. If your going to set it up for an install, I think you'll need to do that. I don't believe anaconda will let you put stuff on a degraded array. You'll still need to set it up before running anaconda, as anaconda will not let you create 1 device arrays.
This won't work for raid 0 and as far as I can tell, mdadm won't let you add or remove devices from raid 10 arrays either.
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