Good morning, [Please trim replies, and avoid top-posting] On 09/23/2013 01:15 AM, P Agenbag wrote: > Hi Phil > > Below, please find the output of the mdadm --examine on the 4 drive's > second partitions. Apologies for omitting that in the first e-mail. > > Appreciate your help. [trim /] So it appears /dev/sd[abc]2 all dropped out together, leaving sdd2 by itself. As such, you should be able to force assembly and carry on. mdadm -Af /dev/md1 /dev/sd[abcd]2 Then you can take a backup of the critical contents, if necessary. (You haven't said how important the data is...) Phil -- 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