Am 16.10.2017 um 15:54 schrieb Wols Lists:

Raid 10 is a complicated subject what with near and far, and whether it
will grow, etc etc.

I'm planning to raid-10 my swap partition, and while it doesn't matter
in the slightest because destroying and recreating will be no hassle for
swap, I'd like to understand what's going on.

If I remember correctly, there was a thread a little while back on
growing a raid-10? And you can't (for certain values of "can't" :-) do it?

Where's the best place to find info about near, far and offset layouts?

http://xmodulo.com/setup-raid10-linux.html