repeating the process on another box, i just noticed that these two results' UUIDs match exactly, /dev/.mdadm/map /dev/md/0_0 52f5b43c:e83f7e2a:be6ad32e:0536ab0e mdadm --detail --scan /dev/md/0_0 52f5b43c:e83f7e2a:be6ad32e:0536ab0e but the OTHER array's two UUIDs /dev/.mdadm/map /dev/md127 79fb7ad4:289bfae5:86c535ff:202960f2 mdadm --detail --scan /dev/md127 d47afb79:e5fa9b28:ff35c586:f2602920 are 'transforms' of one another; e.g., mdadm --detail --scan /dev/md127 d47afb79:e5fa9b28:ff35c586:f2602920 d4 e5 7a fa fb 9b 79: 28:... | | couplet order transform | d4 e5 7a fa fb 9b 79: 28: ... /dev/.mdadm/map /dev/md127 79fb7ad4:289bfae5:86c535ff:202960f2 what's happening here? that can't be a coincidence. is this a bug? or maybe an artifact of the type of array? jeff -- 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