Hello: This is on openSUSE 13.1. I use mdraid with several raid1 (mirror) arrays. I played with one of the arrays and now I can't assemble the array. mdadm -A /dev/md111 /dev/sda7 /dev/sdb7 mdadm: ignoring /dev/sdb7 as it reports /dev/sda7 as failed mdadm: /dev/md111 has been started with 1 drive (out of 2). What does it mean that sdb7 reports sda7 as failed? I tried to assemble sdb7 as a different array: mdadm -A -R /dev/md112 /dev/sdb7 mdadm: Found some drive for an array that is already active: /dev/md111 mdadm: giving up. What does this mean? proc/mdstat gives: md111 : active raid1 sda7[2] 31455164 blocks super 1.0 [2/1] [U_] Why I can't then assemble sdb7 to md112? What I'd like to do now is: Assemble /dev/sda7 to one array and /dev/sdb7 to another array. Mount the two arrays separately to different mount points then compare the contents of the arrays. Synchronize the content if necesary, unmount arrays, and finally reassemble the original array (/dev/md7) with the two drives (dev/sda7 and /dev/sdb7). How can I do that? There is another strange problem: ff I assemble an array it gets mounted automatically. Why? In case of a degraded array with one drive only this can ruin the array. Why is the array mounted automatically upon assembly? It should be only mounted (automatically) on running mount -a and at boot. Thanks, Istvan -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org