Accidentally I've booted with wrong grub parameters and my systems hanged with a kernel panic. After reboot my /dev/md2 device (raid1) stopped to work. These are some logs: wax@persifae:~$cat /proc/mdstat Personalities : [raid1] md2 : inactive sda1[0](S) 293049600 blocks md1 : active raid1 sdc6[0] sdb2[1] 152264000 blocks [2/2] [UU] md0 : active raid1 sdb1[1] sdc5[0] 7815488 blocks [2/2] [UU] unused devices: <none> wax@persifae:~$sudo mdadm -Q /dev/md2 /dev/md2: is an md device which is not active wax@persifae:~$sudo mdadm --assemble --scan /dev/md2 mdadm: failed to add /dev/sdc1 to /dev/md2: Invalid argument mdadm: /dev/md2 assembled from 0 drives - not enough to start the array. wax@persifae:~$cat /etc/mdadm.conf ARRAY /dev/md0 level=raid1 num-devices=2 UUID=2a37b0a1:4b6b28fc:0209446b:c3b28f2a ARRAY /dev/md1 level=raid1 num-devices=2 UUID=19c49c5d:e3193aa1:657f267b:b23c2dee ARRAY /dev/md2 level=raid1 num-devices=2 UUID=62a5cb51:36ca61a3:1298e6c2:30fde3ba Thanks in advance for your help -- 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