On 27/10/17 11:02, David C. Rankin wrote: > How best to clear this array completely so that it doesn't cause mdadm any > problem on the rebuild from the good array? My favourite ... "dd if=/dev/zero of=/dev/sdX". Takes a LLoooonnnnnngggggggg time. But there is an option to mdadm that will wipe the superblock. I don't know whether it will wipe both at once, I'd try it three times and if it comes back with "can't find superblock" the third time you know it's done :-) I've never used it so I can't say how it works. Oh - and when you add it back to the good disk, use --add, and NOT --re-add. That implies to mdadm that it's a new disk needing re-config. Cheers, Wol -- 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
