I just set up a raid 5 array for my media server. I set got 2 new disks, and set up an array with one missing drive, to copy the data from the old single drive to the new array, and later I will add the old drive into the array (after the data has been copied).
This is all going fine. I'm just curious about the contents of
Personalities : [raid6] [raid5] [raid4] md127 : active raid5 sdc1 sda1 3906762752 blocks super 1.2 level 5, 1024k chunk, algorithm 2 [3/2] [U_U] unused devices: <none>
[U_U] mean on the third line? when I see it, I think of an emoticon unhappy face, which kind of matches the state of the array, but I don't think that is it :).