From mboxrd@z Thu Jan  1 00:00:00 1970
From: Simon Matthews <simon.d.matthews@gmail.com>
Subject: Why do arrays start without some components?
Date: Mon, 15 Mar 2010 13:26:27 -0700
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I have a couple of machines on which this is happening now --

When the machine boots, the RAID arrays (RAID 1) start, but each array
only has one component device. I can add the other component again
(using mdadm --add ... ) and the array will sync up, but next time it
boots, I have to do the same once more.

Why is this and how do I fix it?

Simon