Greetings, first of all - thanks to Phil Turmel for pointing me in the right direction. I checked all the cables and true enough, the System SSD's cable's shielding was halfway peeled off. Anyway, the current state is as follows: *) The missing HDDs came up right after the reboot, and I had to use the "bootdegraded=true" kernel option. *) All 12 drives are functional. Here is a link to the requested output of --- mdadm -E /dev/sd[abcd]1 --- --- for x in /dev/sd[a-z] ; do echo $x : ; smartctl -x $x ; done ---- as well as ---- mdadm --examine /dev/sd[abcdefghijklmnop]1 ------ Link: h__p://pastebin.com/v6yzn3KX My findings: The Event count does differ, but not by much. As my next step, I would follow Phil Turmel's advice and reassemble the Array using the --force option, to be precise: mdadm -Afv /dev/md0 /dev/sd[abcdefgjklm]1 Could you please advise me wether this next step is all right to do now that we have new logs etc.? Thanks in advance, Florian Lampel PS: Thanks again to Phil for pointing out that --create would be madness.-- 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