Hello, I have a system with two separate controllers and each controller has 8 disk connected to it, so the disk are numbered as follows: controller 1 sd[abcdefgh] controller 2 sd[ijklmnop] Now I would like to setup a raid 10 from 7 disk from each controller. The first disk on each controller (sda and sdi) is used for some other purpose. How does one set it up, so that if for example controller 1 fails, the array is still working? Does the following command achieve what I want: mdadm -C /dev/md3 -l10 -n14 --metadata=1.1 --layout=n2 /dev/sd[bkcldmenfogphj]1 If yes, what happens for example if say disk sdc fails and is replaced after one day? Will it keep the order so always one controller can break. I tried setting this up using Raid 1+0 as follows: First creating the Raid 1 mdadm -C /dev/md3 -l1 -n2 --metadata=1.1 /dev/sd[bj]1 mdadm -C /dev/md4 -l1 -n2 --metadata=1.1 /dev/sd[ck]1 mdadm -C /dev/md5 -l1 -n2 --metadata=1.1 /dev/sd[dl]1 mdadm -C /dev/md6 -l1 -n2 --metadata=1.1 /dev/sd[em]1 mdadm -C /dev/md7 -l1 -n2 --metadata=1.1 /dev/sd[fn]1 mdadm -C /dev/md8 -l1 -n2 --metadata=1.1 /dev/sd[go]1 mdadm -C /dev/md9 -l1 -n2 --metadata=1.1 /dev/sd[hp]1 Then comes the Raid 0 mdadm -C /dev/md10 -l 0 -n 7 --metadata=1.1 /dev/md[3456789] This works fine only that I do not manage to set this under scientific linux 6.1 up so it comes up after a reboot. Only the Raid 1's will be there after a reboot, not the Raid 0 on top. Any idea what I am doing wrong? Regards, Holger -- 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
