Good morning Neil, [Etiquette on kernel.org is to trim replies and either bottom-post or interleave.] On 12/13/2014 11:30 PM, Neil . wrote: > smartctl says Overall health...: passed for all drives. This is good, but not relevant. Lots of desktop drives will report this even though they are part of the problem. Please show the complete output of "smartctl -x" for the two troublesome drives. Maybe also for the other two. > Update Time : Sat Dec 6 14:00:02 2014 > Events : 3 > Update Time : Sat Dec 6 14:00:02 2014 > Events : 3 > Update Time : Sun Dec 7 11:18:06 2014 > Events : 8 > Update Time : Sun Dec 7 11:18:06 2014 > Events : 8 This looks strange. It suggests that the two drives failed well before your reboot. If you have dmesg from Saturday afternoon, that might be enlightening. However, as a raid 5, you are stuck unless you include at least one of the two stale drives. The correct tool for this is forced assembly: mdadm --assemble --force --verbose /dev/mdX /dev/sd[abcd]2 If it fails, show its output. Whether it fails or not, you need to investigate why the drives were dropped. Simultaneous drops suggest a hardware problem. 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
