(answering to myself is one of my favourite hobbies)
Yep, this looks like it. The events difference is quite big : 0.2701790 vs. 0.2607131... Could it be that the sdb1 was marked faulty a couple of seconds before the power failure ?
I'm wondering : sd[acd] has an Update Time : Thu Jun 29 09:10:39 2006 sdb has an Update Time : Mon Jun 26 20:27:44 2006 When did your power failure happen ? When did you run your mdadm -A /dev/md0 ? - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
